Pitched the majority of the second half of the season with St. Louis, pitching in 13 games (10 starts) over three stints. Was the 7th different Cardinals pitcher to make a start behind the original starting five and Marco Gonzales ... Struck out 72 over 60.1 IP to average 10.74 K/9 IP, the 5th-highest mark among National League starters (min. 60.0 IP), trailing Robbie Ray (12.11), Max Scherzer (12.02), Rich Hill (11.01) and Dinelson Lamet (10.94) ... Was one of five rookie pitchers to sport a pair of double-digit strikeout games (8/23 & 8/29) in 2017: COL's German Marquez, SF's Chris Stratton, PHI's Nick Pivetta & SD's Dinelson Lamet ... As a starter in 10 outings, was 7-2 with a 4.23 ERA (55.1 IP/26 ER), 69 strikeouts and .255 (55-for-216) average against (St. Louis was 8-2) ... Also made three scoreless relief appearances (5.0 IP) ... Recalled for the second time (7/27) and took a loss later that night vs. ARI...allowed 4th inning J.D. Martinez grand slam as his lone blemish in a 5.0 inning start, allowing 5 hits with 4 strikeouts in a 4-0 loss ... Won seven consecutive starts from 8/2-9/20...his teamleading win streak ended as the 4th-longest in the National League and was the longest by any MLB rookie in 2017 ... Became the first Cardinals rookie to achieve the feat since Ted Wilks (1944) & Johnny Beazley (1942) (Elias)...the last Cardinal to win seven straight starts was Matt Morris (8/3-9/4/2001) ... Over the seven-start stretch, including one relief appearance in-between (8/2-9/20), led N.L. pitchers in wins (7), ERA (1.61), WHIP (0.96), BB/9 IP (1.61), SO/9 IP (8.87) and BR/9 IP (8.87), co-led in win percentage (1.000), was 3rd in average against (.213), and T7th in strikeouts (58) ... Became just the fifth rookie pitcher in the last 70 years to allow two runs or fewer over seven consecutive winning starts, joining Fernando Valenzuela (eight straight in 1981), Cal Eldred (1992), Jered Weaver (2006) and Steven Matz (2016) (Elias) ... Limited MIL to 2 runs over 6.1 IP with 8 strikeouts in 5-4 win (8/2) at Miller Park in a spot start for Adam Wainwright... two days later, was optioned to Memphis for a second time when RHP Sam Tuivailala was recalled (8/4) ... Recalled for a third time (8/17) when RHP Trevor Rosenthal was placed on the 10-day disabled list...allowed one hit over 2.0 scoreless relief frames in 11-7 win at Pittsburgh the same night ... Permanently joined the rotation and dominated over his next five starts (8/23-9/14), going 5-0 with a 1.15 ERA, 42 strikeouts, and 4 walks…the last pitcher to go 5-0 with at least 40 K, 4-or-fewer BB, and an ERA that low over a five-start span was Clayton Kershaw (5/1-5/23/16): 0.64 ERA, 55 K, 2 BB…since 1913, the only other rookie to record a comparable five-start span was Roy Oswalt (8/19-9/9/01): 0.66 ERA, 48 K, 2 BB (Elias) ... Hurled 7.0 scoreless frames in 6-2 win vs. SD, (8/23). Established a career-high in innings, tied his career-high in strikeouts (10), scattered 3 hits and walked one in first career scoreless start ... Became sixth Cardinals rookie in franchise history with a start of 7.0+ IP, 0 runs and 10+ K (first since Shelby Miller, 5/10/13 vs. COL) ... Won his 3rd straight decision in 10-2 win at MIL (8/29), scattering 8 hits and fanning 10 over 5.2 innings ... Joined Rick Ankiel as the only Cardinals rookies with backto-back double-digit strikeout games, and Alan Benes as the only Cards with three double-digit strikeouts games within their first 16 career starts ... Won his fourth straight start (9/3) in 7-3 win at SF (opposite Madison Bumgarner). Struck out 9 over 7.0 IP with 4 hits and 2 runs allowed... became the first Cardinals rookie to win four starts in a row since Matt Morris in 1997 (Elias) ... Scattered 7 hits over 5.2 scoreless IP in his 5th straight win in 4-1 win over PIT (9/8) at Busch Stadium..became the first Cardinals rookie to win five straight starts since Allen Watson in 1993 (Elias) ... Allowed 2 hits for 1 unearned run with 6 strikeouts in 6.0 IP in St. Louis' 5-2 win over CIN (9/14) for sixth consecutive winning start ... Struck out 7 and walked 0 in 5.0 IP en route to his seventh straight winning start (9/20) at CIN. Yielded 5 H for 2 R (87 pitches) in 9-2 win ... Ended win streak in loss vs. CHI (9/25), allowing career high 8 runs on 7 hits (2 HR) in 3.0 frames (65 pitches) in 10-2 loss...the win streak was the longest active in the majors at the time. His 8 runs allowed (all with two outs) equaled his run total over his previous seven starts combined (44.2 IP) ... Was 10-2 with a 2.55 ERA at Memphis (AAA) in 15 starts over three stints. His 10 wins were ranked T2nd in the PCL and T5th among Cardinals minor leaguers ... Named Pacific Coast League Mid-Season All-Star, the first mid-season honor of his career, but did not pitch due to promotion to St. Louis ... Named Memphis' Opening Day starter and pitched 2.0 innings (27 pitches) before injuring his back while running the bases ... After being placed on the 7-day disabled list (lower back stiffness) and missing 22 games (4/7-5/2), was named PCL Pitcher of the Week for the May 1-7 period...in his first two starts after being activated, tossed 13.0 shutout innings in two wins while fanning 9 and not issuing a walk ... Named by Minor League Baseball as the PCL Player of the Month for May (5-1, 2.19 ERA, 37.0 IP, 31 H, 11 R, 9 ER, 6 BB, 37 K)...was the first pitcher to win the award since Iowa Cubs' Carlos Pimentel (June 2015) ... Struck out a career-high 11 in 5.0 shutout innings at New Orleans (6/5) in a 4-1 win...four of his 15 outs came via something other than a strikeout ... Rated as the PCL's No. 8 prospect by Baseball America following the season. Also recognized as the league's "Best Pitching Prospect" by league managers in the "Best Tools" survey by the same publication.
Was a non-roster invitee to Major League Spring Training, but a left wrist injury attempting to field a ball during batting practice sidelined him until June, where he started the season in Springfield (AA)...Began the season in Springfield (AA) by going 6-3 with a 1.40 ERA in 12 starts before a promotion to Memphis (AAA) in early August, where he made one start, and was then purchased by St. Louis...Posted 7-3 record with a 1.30 ERA in 13 combined minor league starts (83.0 IP) between Springfield & Memphis...Made his Major League debut at CHI (8/13) after 38 career minor league starts over three professional seasons. Pitched 4.0 innings allowing two runs in a no-decision the Cardinals eventually won, 8-4...Struck out first two Major League batters faced in debut: Dexter Fowler (looking) and Kris Bryant (swinging)...Was the ninth different Cardinal to make his MLB debut in 2016 and the second Cardinals rookie to make a start. Became the 11th Cardinals starting pitcher to make his debut at Wrigley Field and first since Adam Ottavino (2010)...Struck out 45 over 36.1 innings. Averaged 11.15 K/9 IP, which ranked 5th among N.L. starting pitchers (min. 36.0 IP)...His 45 strikeouts were the 2nd-most by a Cardinals rookie in his first 8 career games, trailing Stu Miller's 52 (66.1 IP) in 1952...Allowed three earned runs or less in seven of his eight starts...Earned first Major League win vs. OAK (8/26), allowing one run over 6.0 innings. His then career-high seven strikeouts were the most by a Cardinals pitcher in one of his first three MLB starts since P.J. Walters fanned seven at CHI (4/17/2009)...Batted .385 (5-13) with a multi-hit game at PHI (8/20). Collected first two Major League hits with singles off Jeremy Hellickson...At the time of his purchase, ranked 9th among Texas Leaguers in strikeouts (88) despite starting the season two months late (6/5). Made seven starts with eight or more strikeouts and a season-high 10 at Frisco (6/5) in his season debut...Named Cardinals 2016 June Minor League Pitcher of the Month, posting a 1-3 record with 1.40 ERA over six starts with 42 strikeouts in 38.2 innings, allowing two runs or less in each start...Named the Texas League Pitcher of the Week for May 30 - June 5...Recognized as a 2016 Texas League Post-Season All-Star with Springfield teammate 1B Luke Voit. Also rated as the Texas League's No. 4 prospect by Baseball America.