This is his first career major league stint for Johnson, who will wear No. 61. The 24-year-old, who was named to the 2015 International League Mid-Season All-Star Team, is 8-6 this season with a 2.73 ERA (26 ER/85.2 IP) and 81 strikeouts compared to just 26 walks allowed and 68 hits allowed for the PawSox. He has held opponents to four earned runs in all but one of his 16 appearances, all starts, and has allowed one or no runs on nine occasions. Johnson ranks among IL pitching leaders in wins (T-2nd), WHIP (2nd, 1.10), ERA (7th), opponent batting average (4th, .217), and strikeouts (5th), and is second among qualifying starters in strikeout rate (8.5 SO/9.0 IP). He has held left-handed batters to a .162 average (11-for-68) this year, allowing just one extra-base hit (triple). Signed by the Red Sox as a first round selection in the 2012 June Draft (31st overall), the Florida native has gone 23-15 with a 2.36 ERA (84 ER/320.0 IP) and 301 strikeouts in 64 career minor league appearances, all starts. In 2014, he was tabbed by the Red Sox as the organization's Minor League Pitcher of the Year and was also named to Baseball America's Minor League All-Star Second Team after combining for a 2.13 ERA (34 ER/143.2 IP) in 25 starts between High-A Salem and Double-A Portland.
Buchholz, 30, has posted a 7-7 record in 18 starts this season, leading all Red Sox starters with a 3.26 ERA (41 ER/113.1 IP), 107 strikeouts, and just six home runs allowed. The right-hander, who ranks third in the American League with 0.48 home runs allowed per nine innings pitched, owns a 2.02 ERA (17 ER/75.2 IP) over his last 11 outings since May 15. In five appearances since June 18, the Nederland, TX native has a 1.05 ERA (4 ER/34.1 IP) with 26 strikeouts against only two walks, leading all major league pitchers with four victories. A two-time All-Star selection (2010, 2013), Buchholz has registered a 3.85 ERA (440 ER/1028.1 IP) with 806 strikeouts in 168 career major league games (166 starts), ranking 10th in the American League with a .593 winning percentage (73-50) since the start of 2007.
Hinojosa, 29, has made 19 relief appearances for Pawtucket this season, going 3-1 with a 3.21 ERA (15 ER/42.0 IP) and 39 strikeouts against 17 walks. He made his major league debut on May 3 against the Yankees in his only career stint in the big leagues, walking three batters and striking out two without surrendering a hit or a run in 1.2 innings. In 60 career minor league appearances with the PawSox since 2014, his first pro campaign in the United States, the native of Isla de la Juventud, Cuba has gone 6-6 with a 3.56 ERA (41 ER/103.2 IP) and 104 strikeouts while holding opponents to a .211 batting average. Before signing with the Red Sox as an international free agent on October 10, 2013, Hinojosa played nine seasons for Guantanamo of Cuba's Major League Serie Nacional.