Made 11 starts for the Red Sox in his ML debut, slotting into the rotation for the final 2 months of the season after beginning the year with 21 starts for Triple-A Pawtucket. Held opponents to 1 or no ER in 6 of his starts...Was just the 3rd Red Sox since 1914 to begin his career with 6 such starts within his first 11 career games, along with Eduardo Rodriguez (7 of first 11 in 2015) and Dave Ferriss (6 of first 11 in 1945). Allowed 7 ER each in 3 of his 11 starts...Gave up 11 total ER in his other 8 outings (1.94 ERA, 51.0 IP). Was recalled from Pawtucket on 8/4 to make his ML debut at Yankee Stadium...Allowed 3 runs in 5.0 IP and suffered the 13-3 loss...At 23 years and 14 days old, was the youngest Red Sox pitcher to debut at NYY as a starter since Billy Rohr on 4/14/67 (21 years, 287 days). In his 2nd career start on 8/9 at DET, earned his 1st ML win, allowing just 1 run on 3 hits in 5.0 IP...Defeated Justin Verlander (5.0 IP, 3 H, 1 R/ER, 4 BB, 2 SO) to become the 1st Red Sox ever to earn his 1st career win over a former Cy Young Award winner (Source: Elias Sports Bureau). Fanned 10 batters in his 3rd start on 8/16 vs. SEA but gave up 7 runs...At 23 years and 26 days old, was the youngest Red Sox pitcher to reach 10 SO since Jon Lester on 6/21/06 vs. WSH (22 years, 165 days)...Also became the 3rd pitcher in Red Sox history to tally 10+ strikeouts in his Fenway debut, joining Pedro Martinez (12 on 4/11/98 vs. SEA) and Don Aase (11 on 7/26/77 vs. MIL). On 8/21 vs. KC, went a season-high 8.0 IP and allowed just 1 ER to pick up his 2nd win. Did not allow a run over 16.0 consecutive IP from 9/8-22, the longest scoreless streak by a Red Sox all year. In 4 starts from 9/8-27, posted a 1.61 ERA (5 ER/28.0 IP), including 3 straight starts pitching into the 8th inning...Led Boston with 4 starts longer than 7.0 IP in the 2nd half. Held the opposition to a .194 OBP with 2 outs, the lowest mark among all ML starters (min. 50 BF). Began the year with the PawSox, going 3-8 in 21 starts despite leading team pitchers and finishing 10th in the International League with a 3.16 ERA (43 ER/122.1 IP). Led IL qualifiers with a .193 opponent AVG, allowing just 84 hits in 122.1 IP...His 1.14 WHIP ranked 2nd in the IL. Despite making his final Triple-A start on 7/29, placed 7th in the IL with 103 SO. Following the season, was ranked by Baseball America as the No. 8 prospect in the International League.
Combined to lead the minor leagues in wins, going 17-5 with a 2.94 ERA (52 ER/159.0 IP) in 26 starts between Double-A Portland and Triple-A Pawtucket...Named to Baseball America's Minor League All-Star First Team and tabbed as Red Sox Minor League Pitcher of the Year. Began the season with 20 starts for the Sea Dogs and named Eastern League Pitcher of the Year...Also selected by Baseball America as the best pitching prospect in the EL, and named a mid- and postseason Eastern League All-Star. Set a single-season franchise record with an Eastern League-leading 14 wins for the Sea Dogs...Also topped the EL in SO (126), SO rate (9.4 SO/9.0 IP), complete games (tied, 3), and shutouts (tied, 2) despite 8/1 promotion to Pawtucket...Ranked among EL leaders in opponent AVG (2nd, .201), ERA (3rd, 2.60), and WHIP (4th, 1.12)...Allowed only 6 HR in 121.0 Double-A IP. Did not allow a run in 7 of his 20 starts for Portland (35%). Started Portland's season-opener on 4/3 at Reading and hurled a rain-shortened, 6.0-inning no-hitter (2 BB, 9 SO). Did not allow a run in his next start, 4/9 at Trenton (6.2 IP), and was named EL Pitcher of the Week for 4/3-13, over which he went 2-0 with 12.0 scoreless IP. Named Red Sox Minor League Starting Pitcher of the Month for May (6 GS, 3-2, 1.51 ERA, 6 ER/35.2 IP, 39 SO). Set a Sea Dogs record by winning 9 straight starts from 5/24-7/19 (1.46 ERA, 10 ER/61.2 IP). Had a 27.0-IP scoreless streak, which began with 3 consecutive scoreless starts on 5/24 at New Hampshire (7.0 IP), 5/29 vs. New Britain (7.0 IP), and 6/4 vs. Erie (8.0 IP), over which he allowed 9 total hits in 22.0 IP. Elected to start the MLB All-Star Futures Game for the victorious U.S. Team on 7/13 in MIN (1.0 IP, 1 H, 0 R, 0 BB, 1 SO). Struck out a season-high 11 batters in an 8.0-IP start on 7/6 vs. New Britain. Led all Triple-A pitchers with 44 SO from his 8/4 debut through the end of the regular season (38.0 IP)... Went 3-1 in 6 starts in that time. Allowed 2 hits and fanned 9 over 6.2 scoreless IP for the win in his Triple-A debut on 8/4 vs. Columbus. Recorded 11 SO in 8.0 IP for the PawSox over 2 postseason starts (0-1, 9.00 ERA). After the season, named by Baseball America as the No. 2 prospect in the Red Sox system, the organization's top-rated pitching prospect, and the No. 44 prospect in baseball. Also tabbed by Baseball America as possessing the system's best changeup for a 3rd straight year, as well as having the best breaking pitch and the best changeup in the EL.
Named Red Sox Minor League Pitcher of the Year and Baseball America's High-A Pitcher of the Year…Also earned a spot on Baseball America's Minor League All-Star Second Team...Ranked 2nd among all minor leaguers with 169 strikeouts, trailing only Rockies farmhand Daniel Winkler (175)…Marked the most by a Red Sox minor leaguer since Clay Buchholz in 2007 (171)...Averaged 11.3 strikeouts per 9.0 innings, the best mark among minor leaguers with at least 120.0 innings...Tied for the most wins in the Red Sox system (11) between High-A Salem (20 starts) and Double-A Portland (6 starts)...Started the year with Salem and was a mid-season Carolina League All-Star…Totaled 9 scoreless starts, including 7 with Salem and 2 for Portland...Held lefties to a .203 AVG and right-handers to a .167 AVG...Named Red Sox Minor League Starting Pitcher of the Month for July (2-2, 2.96 ERA, 33 SO in 5 starts with Salem)and August/September (3-1, 1.78 ERA, 46 SO in 6 starts with Portland)...Allowed 2 ER or fewer in his first 6 starts of the year from 4/6-5/4 (2.25 ERA, 8 ER/32.0 IP)...Threw 19.1 consecutive hitless innings from 7/11-28…Was named CL Pitcher of the Week for 7/15-21...On 7/17, tossed the 1st 6.0 innings and earned the win in Salem's 3-pitcher no-hitter at Frederick…Fanned a season-high-tying 10 batters (also 5/4 at Winston Salem)...Struck out 9 batters in 5.0 hitless frames for the win in his next start on 7/22 at Potomac...Notched a 1.78 ERA (6 ER/30.1 IP) in 6 starts for Portland following an 8/1 promotion...Struck out 11 over 6.0 scoreless innings in his Double-A debut on 8/3 at Bowie...Overall, went 5-2 with a 1.60 ERA (10 ER/56.1 IP), .133 opponent AVG (25-for-188), and 76 strikeouts in his last 10 starts of the year beginning on 7/11...Following the season, ranked as Boston's top pitching prospect and No. 2 prospect overall by Baseball America…Also named as having the best changeup in the Red Sox minor league system...Also tabbed the No. 2 pitcher and No. 4 prospect overall in the Carolina League by BA, as well as having that circuit's best changeup.