Over the last 3 seasons led the Reds' pitching staff in wins (28), starts (78), IP (449.2) and strikeouts (489)...In 2019 was the Reds' Opening Day starting pitcher, a National League All-Star and the NL's Pitcher of the Month for March/April...In 2019 averaged 10.57 strikeouts per 9 innings, the highest ratio in Reds history for pitchers with a minimum of 125 innings...In 2019, Castillo (226 strikeouts) and Sonny Gray (205) became the first Reds teammates to each record at least 200 strikeouts in the same year...their strikeout ratios of 10.67 and 10.52 per 9 innings, respectively, were the highest in Reds history for pitchers with at least 125 innings...Per Baseball America, in 2019 his changeup was voted by managers, scouts and executives the best in the National League...Was the Reds' Minor League Pitcher of the Month for June 2017...When acquired by the Reds in January 2017 was rated by Baseball America the second-best prospect in the Marlins' system and by MLB.com their fifth-best prospect...In 2016 was Marlins Minor League Pitcher of the Year, Florida State League Pitcher of the Year, a Baseball America High Class A All-Star, an MiLB.com Organizational All-Star, FSL mid-season All-Star and Marlins Minor League Pitcher of the Month for May.
In his third Major League season at just 26 years old, was the Reds' Opening Day starting pitcher and a National League All-Star...elected by his peers, joined Sonny Gray as the first Reds starting pitchers named to the All-Star team since Johnny Cueto and Alfredo Simon in 2014...Was National League Pitcher of the Month for March/April (7gs, 3-1, 1.45) after ranking second in the NL and third in the Major Leagues in ERA, second in the NL and sixth in the majors in strikeouts (50) and third in the NL and T6th in the majors in innings pitched (43.1)...was the first Reds pitcher to win the monthly award since LHP Denny Neagle in September 1999 and the first Reds righthanded starter recognized since Jose Rijo in September 1992...Averaged 10.57 strikeouts per 9 innings, the highest ratio in Reds history for pitchers with a minimum of 125 innings...Ranked among the National League leaders in opponents' BA (.202, 3rd), wins (5th), ERA (12th), innings pitched (10th), strikeouts (9th), strikeouts per 9 innings (10.67, 6th) and starts (T8th)...Became the first Reds pitcher with 15 wins in a season since Johnny Cueto (20-9) and Alfredo Simon (15-10) each did it in 2014...Castillo (226) and Sonny Gray (205) became the first Reds teammates to each record at least 200 strikeouts in the same year...their strikeout ratios of 10.67 and 10.52 per 9 innings, respectively, were the highest in Reds history for pitchers with at least 125 innings...Led the team in wins, starts, quality starts (20), innings pitched and strikeouts, all career highs...In his first career Opening Day start was the victim of a blown save in the 5-3 win vs Pit (5.2ip, 2h, 1er, 3bb, 8k)...became the fifth straight different Opening Day starter for the Reds (Johnny Cueto 2012-2015, Raisel Iglesias 2016, Scott Feldman in 2017, Homer Bailey in 2018)...is the longest stretch of different Opening Day starting pitchers since a 6-year stretch from 2001-2006 (Pete Harnisch 2000-2001, Joey Hamilton 2002, Jimmy Haynes 2003, Cory Lidle 2004, Paul Wilson 2005, Aaron Harang 2006)...Produced 8 starts in which he threw at least 5.0 innings while allowing 2 hits or fewer and 2 runs or fewer, a single-season franchise record...Began the season 1-1, 0.92 in his first 3 starts (19.2ip, 5h, 2er, 8bb, 25k)...since the distance from the pitching rubber to home plate was set at 60 feet, 6 inches in 1893, only 3 times in Major League history has a pitcher made 3 consecutive starts in a season with at least 8 strikeouts and no more than 2 hits allowed in each game (Sea's Randy Johnson, 1997 & NYG's Rube Marquart, 1911)...Castillo's streak, to open this season, was snapped in the 4-3 walkoff loss on 4/15 at LAD (5ip, 4h, 2er, 5bb, 7k)...Over 13 apps from 4/9-6/17 produced a career-high 7-game winning streak (7-0, 2.40)...was the longest winning streak by a Reds pitcher in 2019...On 4/20 at SD recorded his 300th career strikeout (Manny Machado)...In the third inning on 7/15 at Wrigley Field allowed a 2-out, solo HR to Kyle Schwarber than snapped his career-high scoreless streak at 14.2 innings...In his 7-4 win on 8/5 vs LAA, his career-high 13 strikeouts were the most by a Reds pitcher since Raisel Iglesias had 13 strikeouts on 8/23/15 vs Ari and the most by a Reds pitcher in 2019...In the second inning of his 2-0 loss on 9/7 vs Ari recorded his 200th strikeout of the season (Josh Rojas)...In the National League's 4-3 All-Star Game loss at Cle's Progressive Field, threw a perfect fourth inning (Carlos Santana K, J.D. Martinez K, Alex Bregman 4-3)...Per Baseball America, his changeup was voted by managers, scouts and executives the best in the National League.
At 25 years old and in just his second Major League season led the staff in wins, losses, starts, quality starts (11), innings pitched and strikeouts...among National League leaders ranked T3rd in HR allowed and 10th in runs allowed...after the All-Star Game break, his 2.44 ERA over 11 starts was fifth-best in the National League and ninth-lowest in the Major Leagues...received votes for the National League Pitcher of the Month Award for September after producing a 3-1 record while tying for the Major League lead with a 1.09 ERA...in his last 3 starts of the season went 2-0, 0.84 (21.1ip, 13h, 2er, 6bb, 6k, 1hr) and finished the year with a career-high 10.0-inning scoreless streak over his 2 final starts...his season-high 3-game winning streak from 5/8-5/24 (4gs, 3-0, 2.78) was the first winning streak of his career...produced an additional pair of 2-game winning streaks...in his 4-0 win on 9/1 at StL recorded a career-high 11 strikeouts, the second-highest total by a Reds pitcher in a game in 2018 (Tyler Mahle, 12k, 6/30 vs Mil)...in the 10-inning, 1-0 loss on 9/21 at Mia, his final start of the season, didn't allow a run in 8.1 innings...was a career high for innings pitched in a game and the longest outing by a Reds pitcher in 2018...during spring training, from 3/13-3/17 spent time in New York with wife Delores while celebrating the birth of their first child, Brittany.
Led National League rookies in ERA and opponents' batting average (.202) while ranking eighth among rookies in strikeouts...following the season was rated by Baseball America the seventh-best prospect in the Southern League...was the organization's Minor League Pitcher of the Month for June (4gs, 3-1, 1.42, 1cg at Pensacola)...the Reds went 7-8 in his 15 starts...with 8 quality starts ranked second on the staff behind Scott Feldman's 9 QS...produced all 8 quality starts in his last 12 apps beginning 7/8 (3-6, 2.84), including 6 QS in his last 8 apps beginning 7/30 (2-3, 2.37)...beginning 7/8 and among pitchers with at least 12 starts, his 2.84 ERA ranked seventh in the Major Leagues behind Corey Kluber (1.79), Justin Verlander (1.92), Kyle Hendricks (2.19), Luis Severino (2.40), Jake Arrieta (2.48) & Marcus Stroman (2.73)...beginning 7/30 and among pitchers with at least 8 starts, his 2.37 ERA ranked seventh in the Major Leagues behind Stephen Strasburg (0.84), Corey Kluber (1.42), Justin Verlander (1.65), Kyle Hendricks (2.23), Jake Arrieta (2.27) and Robbie Ray (2.28)...began the season at Pensacola and made 14 starts there before he was promoted on 6/23 to start at Wsh...joined the rotation along with RHP Homer Bailey to fill the spots in the rotation previously occupied by RHP Asher Wojciechowski (DFA) and RHP Bronson Arroyo (disabled)...spent the rest of the season with the Reds...in each of his first 2 career starts was the victim of a blown save...left his Major League debut with a 5-2 lead over Wsh and left the 4-3 win on 6/28 vs Mil with a 3-2 lead...in his debut on 6/23 at Wsh, thanks to a 5-hit, 4-run top of the first inning made his first career plate appearance (groundout) before he threw his first career pitch...struck out his first batter (Trea Turner) and allowed a home run to his second (Brian Goodwin)...his Major League debut was his first professional appearance above Class AA...earned his first career win in his fourth start, on 7/8 at Ari (7-0 win, 6.2ip, 3h, 1bb, 8k)...made a second scoreless start on 8/15 at Cubs (2-1 win, 6ip, 2h, 2bb, 7k)...on 7/20 vs Ari singled off Patrick Corbin for his first career hit...on 5/5 at Chattanooga allowed a season-high 5 runs in 1.2 innings, his shortest start of the season...his ERA in his other 13 starts for Pensacola was 2.06.
Was Marlins Minor League Pitcher of the Year, Florida State League Pitcher of the Year, a Baseball America High Class A All-Star and an MiLB.com Marlins Organizational All-Star...also was Marlins Minor League Pitcher of the Month for May (5g, 4gs, 2-1, 1.67) and a Florida State League mid-season All-Star...combined to finish 8-6, 2.26 in 26 games and 24 starts for Class A Jupiter and Class AA Jacksonville...his sterling 2.26 ERA ranked third among all minor league pitchers with at least 24 starts...led the Florida State League in ERA (2.07) and opponents' batting average (.219) while ranking second in WHIP (0.96)...threw his only professional complete game on 8/17 for Jupiter, a 1-0 loss shortened by rain to 5.2 innings...on 7/29 was included as part of Mia's trade with SD that also sent RHP Jarred Cosart, RHP Carter Capps and 1B Josh Naylor to the Padres for RHP Andrew Cashner, RHP Colin Rae and RHP Tayron Guerrero...after Rae experienced right elbow issues following his lone start with Mia, the Padres and Marlins agreed to restructure part of the trade...on 8/1 Castillo was returned to the Marlins in exchange for Rae.