Hit .291 (174-for-597) with 92 R, 42 2B, 8 3B, 18 HR, 77 RBI, 46 BB, and 21 SB in his 1st full major league season at age 22... Led the Red Sox in runs, doubles, and triples as the team's youngest primary leadoff hitter since Ellis Burks in 1987. Finished tied for 19th in AL MVP voting... Received the Jackie Jensen Hustle Award from the Boston Baseball Writers, presented each year to a Red Sox player for spirit and determination. Placed among AL leaders in 2B (third), 3B (tied for ninth), XBH (ninth, 68), multi-hit games (sixth, 52), 3+ hit games (tied for seventh, 15), SB (tied for 10th), AVG (14th), AVG with RISP (eighth, .333), AVG at home (ninth, .322), and AVG at night (eighth, .304)... Was worth 6.0 wins above replacement according to Baseball Reference, tied for sixth best among AL players. Was the hardest player to double up in the majors, grounding into just two double plays in 597 AB (298.5 AB/ GIDP)... Went 323 AB before his first GIDP, most by a Red Sox to begin a season since Otis Nixon in 1994 (398 AB). Was 1 of 12 AL players to hit more fly balls than ground balls (0.99 GB/FB)... Had the 14th-lowest strikeout rate in the AL (7.98 PA/SO)... Had the seventh-highest contact rate among AL qualifiers (85% of swings made contact). Was the first major leaguer with at least 42 2B, 8 3B, and 18 HR in an age-22 season or younger since SF's Jack Clark in 1978 (46 2B, 8 3B, 25 HR)... The last AL player to accomplish the feat (and the only other Red Sox player ever to do so at that young an age) was Ted Williams in both 1940 (43 2B, 14 3B, 23 HR) and 1939 (44 2B, 11 3B, 31 HR). No other AL player had ever reached his totals in 2B (42), HR (18), and SB (21) in a season at 22 years old or younger... The only NL player to do it that young was Cincinnati's Vada Pinson in 1959 (47 2B, 20 HR, 21 SB). His 68 XBH marked the most by a Red Sox in a season, all before turning 23, in 75 years... Ted Williams (80 XBH) and Bobby Doerr (69 XBH) both accomplished the feat in 1940. Joined Ellis Burks (20 HR, 27 SB in 1987) as the only Red Sox ever with as many as 15 HR and 20 SB in a season at age 22 or younger. Topped the majors with 69 RBI and 60 XBH from the leadoff spot in only 117 starts batting 1st, most by a Red Sox at age 22 or younger since at least 1914... His 106 leadoff starts as a center fielder were third most in a season since 1988 prior to turning 23 (Mike Trout, 110 in 2012; Andrew McCutchen, 108 in 2009). Played 133 games (130 starts) in center field... Also made 11 starts in RF, all during the team's last 17 games from Sept. 18 on. Led the Red Sox with 10 outfield assists, all from center field ...Marked the fourth-most assists in the majors from center field... Placed fourth among AL centerfielders with nine defensive runs saved, according to Fangraphs. Hit .315 (141-for-448) in his last 108 games beginning May 19, second in the AL behind BOS' Xander Bogaerts (.335). Placed on the 7-day concussion DL on July 29... In 48 games following Aug. 11 activation, hit .340 (71-for-209) with 17 2B, 2 3B, 8 HR, 29 RBI and a .941 OPS... Ranked second in the AL in that time in hits and total bases (tied, 116). Had the team's two longest hit streaks in 2015, a 13-gamer from June 11-26 and a team-high 18-gamer from Aug. 24-Sept. 13... Was the third Red Sox to hit in 18 straight games before turning 23 years old, along with Ted Williams in 1941 (23 games) and Bobby Doerr in 1939 (18). Had a career-high 36-game on-base streak from Aug. 24-Oct. 3 (.360/.416/.607, 54-for-150, 14 2B, 3B, 7 HR, 14 BB, HBP), longest in a season by a Red Sox since Dustin Pedroia reached in 37 straight games from June 15-July 28/11. Went 2-for-4, HR, BB as Boston's leadoff man and centerfielder on Opening Day, April 6 at Philadelphia... At 22, was the youngest Red Sox with an Opening Day home run since Tony Conigliaro (20 in 1965)... Was the club's youngest Opening Day leadoff hitter since Rico Petrocelli (21 in 1965) and youngest Opening Day centerfielder since Conigliaro (19 in 1964). In Boston's home opener on April 13 vs. Washington, became the first Red Sox leadoff hitter with at least 1 HR, 4 RBI, and 2 SB in a game since RBI became official in 1920... Made home run-saving catch to rob Bryce Harper in the top of the first inning, then hit a three-run home run in the second... Stole second base and third base on the same play in the bottom of the first inning with Washington in a shift for David Ortiz, marking only the 12th time since 1915 (including postseason) a player stole two or more bases on the same play (Source: Trent McCotter, SABR). Had his first career walk-off hit on April 27 vs. Toronto (ninth-inning single). On May 5 vs. Tampa Bay, accounted for both Red Sox runs in a 2-0 win with a pair of solo homers, his 1st career multi-home run game... Went deep in the sixth inning, the team's first hit of the game, and did it again in the eighth... Was the youngest Red Sox with a multi-home run game since Jim Rice in 1975 and the club's youngest leadoff hitter to do it since Bobby Doerr at 21 in 1939... According to Elias, became just the second leadoff hitter in MLB history to hit at least 2 HR and drive in all of his team's runs in a shutout, along with LA Dodgers' Carl Crawford on Apr. 28, 2013 vs. Milwaukee (two solo home run). Earned first career AL Player of the Week Award for June 15-21... Led MLB with a .581 AVG, 1.594 OPS, 18 hits, 19 times on base, and 31 total bases in those seven days. Hit the team's only leadoff homer of the year on June 20 at Kansas City off Edinson Volquez. Became the youngest Red Sox ever with a multi-HR game at NYY when he went deep twice on Sept. 30.
Climbed from Double-A to Triple-A and made ML debut at 21 years old...Hit .291 (55-for-189), 12 2B, 3B, 5 HR in 52 games over 3 stints with BOS...Named to Baseball America's MLB All-Rookie Team and Minor League All-Star First Team...Among Red Sox with at least 200 PA, ranked 2nd in OBP (.368) and OPS (.812)...Reached base in 42 of 50 starts...His .368 OBP ranked 2nd among ML rookies with at least 200 PA (CWS' Jose Abreu, .383)...Joined Ted Williams(.436 in 1939, .442 in 1940) as the only Red Sox ever to post an OBP that high at age 21 or younger (min. 200 PA)...Played his first 38 ML games in the OF (28 games at CF, all starts; 12 games at RF, 8 starts)...His last 14 games beginning on 9/13 were all at 2B...Selected to BOS' major league roster on 6/28 and made big league debut the next night at NYY, singling off Chase Whitley in the 4th inning for his 1st hit...Hit 1st HR in his 4th ML game on 7/2 vs. CHC, a 5th-inning shot off Carlos Villanueva...Sent back to Pawtucket on 7/19 when Shane Victorino was activated from the DL...Recalled on 8/1 and played 3 games before being optioned again on 8/7 when Kelly Johnson was activated...Returned for his 3rd ML stint on 8/18 and started all 39 remaining Red Sox games...In that time, ranked among AL leaders in times on base (4th, 66), OBP (5th, .391), and runs (T-5th, 28)...Also led the team in extra-base hits (15), AVG (.304), SLG (.466), and OPS (.857) during that stretch...Hit 1st career grand slam on 8/29 at TB in the 2nd inning off Chris Archer...At 21 years and 327 days old, became the youngest Red Sox with a grand slam since Tony Conigliaro did it at 20 years old on 8/24/65 vs. WSH...Reached base safely in 24 of his last 27 games beginning 8/31...In that time, ranked 10th in the AL with a .324 AVG (35-for-108) and scored 23 runs, 1 shy of the ML lead (LAA's Mike Trout, 24)...Took over as Boston's leadoff hitter on 9/6 and batted .305 (25-for-82) with a .387 OBP in that role over the last 21 games of the season...Hit his 1st career leadoff homer on 9/21 at BAL off Miguel Gonzalez...At 21 years old, was the youngest Red Sox with a leadoff shot since 21-year-old Bobby Doerr on 8/1/39 vs. CLE's Bob Feller...In 151 total games between Double-A, Triple-A, and MLB, combined to hit .328 (193-for-588) with 42 2B, 6 3B, 16 HR, 83 RBI, 82 BB, 81 SO, 40 SB, a .411 OBP, .502 SLG, and .913 OPS...Named Red Sox Minor League Offensive Player of the Year for a 2nd straight season...Reached base via hit or walk in 92 of 99 minor league games between Double-A Portland and Triple-A Pawtucket, leading the Red Sox farm system with a .346 AVG (138-for-399)...Struck out only 50 times compared to 61 walks, posting a .431 OBP...Named Red Sox Minor League Player of the Year by both the Boston Baseball Writers and Baseball America...Selected to the U.S. roster in the SiriusXM All-Star Futures Game...Was the 2B on Baseball America's Minor League All-Star First Team and All-Rookie Team...Also tabbed by BA as the Eastern League's best defensive 2B...Began the year in his Double-A debut and hit .355 (76-for-214) in 54 games for Portland...Chosen as Eastern League Player of the Month for April... In 22 April games, led the league in AVG (.430), hits (40), XBH (15), total bases (64), runs (30), OBP (.481), SLG (.688), and OPS (1.169)...Led off Sea Dogs' season with a homer on 4/3 at Reading...Earned EL Player of the Week honors for 4/3-12 (.457, 16-for-35, 11 R, 5 2B, 3B, HR, 4 RBI in 9 G)...Named Red Sox Minor League Hitter of the Month and Defensive Player of the Month for April...Batted .430 (40-for-93) with 10 2B, 3B, 4HR, 13 RBI, and 11 BB with no errors...His 40 hits, 10 2B, and 10 SB tied Portland franchise records for April. ..Was Boston's Minor League Base Stealer of the Month for June, when he was successful in all 12 SB attempts...Reached base safely in an EL-best 36 straight games to begin the season from 4/3-5/16...On 5/17, drove in 2 runs but snapped a 71-game on-base streak between 2013 (High-A Salem regular and postseason) and 2014 in Portland...Promoted on 6/3 to Triple-A Pawtucket and hit .335 (62-for-185) in 45 games for the PawSox.
Named Red Sox Minor League Offensive Player of the Year and selected to Baseball America's Minor League All-Star 2nd Team after hitting .314 (145-for-462), 36 2B, 4 3B, 15 HR, 65 RBI, 81 BB in 127 games between Single-A Greenville and High-A Salem...Paced all Red Sox minor leaguers in total bases (234), 2B (tied, 36), SB (38), and SLG (.506, min. 250 AB)...Began the season with the Drive and earned a spot as the utility player on the South Atlantic League Mid-Season All-Star Team...Named both Red Sox Minor League Hitter and Base Runner of the Month for May (.356, 19 XBH, 23 R, 8 SB, 21 BB in 26 games)...Matched the longest hit streak of the season in the SAL with a 19-gamer from 5/5-25 (.419, 31-for-74, 8 2B, 6 HR, 9 RBI, 14 BB)...Named SAL Player of the Week for 5/6-13...Promoted to Salem on 7/9 and named the Red Sox Minor League Base Stealer of the Month for July after swiping 15 bases in 16 attempts over 20 games between the Drive and Salem...Twice selected as Carolina League Player of the Week: 8/5-12, 8/19-26...Named Red Sox Minor League Hitter of the Month for August/September, batting .404 (46-for-114)...Closed out the regular season with a 30-game on-base streak, the longest in the CL all year (.418, 46-for-110, .496 OBP)...Reached safely in 10 of 20 PA in postseason play for the CL Champion Salem Sox (.412, 7-for-17)...After the season, hit .271 (16-for-59) for the Arizona Fall League Champion Surprise Saguaros and was named to the West Division Fall Stars Team...Following the season, ranked as the 3rd-best 2B prospect in baseball by Baseball America, No. 75 overall, and the Red Sox' No. 7 prospect, as well as the best athlete in the system....Also named the 7th-best prospect in the CL by the same publication.