Appeared in 26 games (23 starts) in his first season with the White Sox … started 2015 with Triple-A Charlotte. ... Ranked among the major-league rookie leaders in winning percentage (2nd, .600), wins (T3rd, 9), IP (5th, 139.1), strikeouts (5th, 139) and starts (T5th). ... His 139 strikeouts were the second-most by a White Sox rookie behind Gary Peters (189 in 1963). ... Made 16 quality starts and allowed two earned runs or less 16 times … posted a 3.07 ERA (26 ER/76.1 IP) on the road, compared to a 4.57 mark (32 ER/63.0 IP) at home. ... Went 5-2 with a 1.81 ERA (11 ER/54.2 IP) and .198 (38-192) opponents average over his final eight starts, compared to 4-4 with a 5.17 ERA (45 ER/78.1 IP) and .277 (83-300) opponents average over his first 15 starts. ... Was 3-1 with a 2.27 ERA (11 ER/43.2 IP) over eight games (six starts) vs. the American League Central and 4-1 with a 2.24 mark (14 ER/56.1 IP) and 58 strikeouts vs. the AL West. ... Limited left-handers to a .194 average (27-139) with zero home runs and 41 strikeouts … lowered his opponents average from .267 (66-247) in the first half to .237 (64-27) after. ... Reached the 100-strikeout mark in 90.2 IP, the fastest in franchise history (STATS LLC). ... Prior to his major-league debut, threw just 34.1 IP in the minor leagues, the fifth-fewest by a White Sox pitcher since 1987 at the time of his debut. ... His contract was purchased from Charlotte on 4/20 … made his major-league debut on 4/21 vs. Cleveland, allowing two runs on three hits with three walks and one strikeout over 2.1 IP (60 pitches) … struck out Lonnie Chisenhall in the eighth inning for his first career strikeout … worked a perfect eighth inning in his second appearance on 4/29 at Baltimore. ... Earned his first major-league win in his first start on 5/9-2 vs. Cincinnati, allowing two runs with eight strikeouts over 6.0 IP. Was moved into the starting rotation on 5/12 … received a no decision on 5/15 at Oakland (5 ER/4.0 IP). ... Worked at least 6.0 IP with one or no runs allowed in four consecutive starts from 5/20-6/9 … became the first Sox rookie to accomplish the feat since Bruce Howard went five straight in 1964-65 (STATS LLC). ... Allowed just one run with 10 strikeouts over 6.0 IP on 6/4 at Texas but received his fourth straight no decision … at 22 years and 176 days old, became the youngest White Sox pitcher to strike out 10 or more batters since Jason Bere (22 years, 117 days) fanned 12 on 9/20/93 at California (Elias). ... Threw 6.0 scoreless IP for his second win on 6/9 vs. Houston … suffered his first career loss on 6/15 at Pittsburgh after allowing seven earned runs on nine hits over 3.2 IP. Earned his third win, and snapped the White Sox eight-game losing streak, on 6/20 vs. Texas (2 ER/6.0 IP). ... Received a no decision on 7/10 at Wrigley Field despite allowing just two hits with six walks over 6.0 scoreless IP … the last White Sox to issue six-plus walks without allowing a run was Jose Contreras (6.2 IP) on 9/2/07 at Cleveland. ... Scattered five hits with zero walks and nine strikeouts over 6.2 scoreless IP in a win on 7/26 at Cleveland. ... Allowed three runs or less in each of his final eight starts from 8/11-9/25, going 5-2 with a 1.81 ERA (11 ER/54.2 IP), 49 strikeouts and eight quality starts. ... Earned the win on 8/11 vs. the Angels, allowing just four hits with one walk and a career-high 11 strikeouts over 7.0 IP … the 11 strikeouts were the most by a White Sox rookie since Jason Bere fanned 12 on 9/20/93 vs. California. ... Became the fourth Sox rookie to record 10 or more strikeouts at least twice in a season, joining Bere (twice 1993), Gary Peters (twice in 1963) and Jack Harshman (three times in 1954). ... Became the fifth rookie in club history to strike out 11 during a scoreless outing, joining Frank Lange (1910), Harshman (1954), Peters (1963) and Bere (1993) and second in MLB this season (San Francisco's Chris Heston, no-hitter on 6/9 vs. the Mets). ... Suffered the loss on 8/17 at Angel Stadium despite throwing his first career complete game (2 ER/8.0 IP) … became the first White Sox rookie to go the distance since Zach Stewart on 9/5-2/11 at Minnesota and first rookie left-hander since Wilson Alvarez on 9/1/91 vs. Cleveland. Finished the season on a three-game winning streak from 9/8-25 … surrendered just four earned runs with 16 strikeouts over 20.2 IP … allowed one earned run in consecutive starts on 9/8 vs. Cleveland (7.0 IP) and 9/19 at the Indians (7.2 IP) … won his final start on 9/25 at Yankee Stadium (2 ER/ 6.0 IP). ... Entered the season ranked by Baseball America as the No. 1 Prospect in the White Sox organization … also tabbed by the same publication as possessing the Best Slider.