Last name is spelled De León...In 2016 was a Baseball America Class AAA All-Star and PCL Pitcher of the Week for 8/21-8/27...In 2015 was a California League All-Star and Pitcher of the Week for 5/4-/10...In 2014 was the Pioneer League Pitcher of the Year, an MiLB.com Dodgers Organizational All-Star and Pioneer League Pitcher of the Week for 6/23-6/28 and 8/4-8/10...Following the 2015 season, his changeup was rated by Baseball America the best in the Texas League...After 2 spring training apps in 2018 was diagnosed with a torn ulnar collateral ligament in his right elbow...on 3/13 had season-ending surgery and spent the year on the Rays' disabled list...entered the season rated by Baseball America the 29th-best prospect in the Rays' minor league system...In March 2017 was added to Puerto Rico's roster for the second round of the World Baseball Classic and threw 2.2 scoreless innings (5k) in a start vs Venezuela...his strikeout victims included José Altuve (twice), Robinson Chirinos, Alcides Escobar and Ender Inciarte...In a 7-4 win on 9/4/16 vs SD became the youngest Dodgers pitcher to win his Major League debut since Nathan Eovaldi on 8/6/11 at Ari (6ip, 5h, 4r, 3er, 0bb, 9k, 1hr)...was the fifth pitcher since records became available in 1913 to win his debut as a starter while recording 0 walks and at least 9 strikeouts, the first since Wsh's Stephen Strasburg on 6/8/10 vs Pit...became the first Dodgers pitcher to win the first 2 apps of his career as a starter since Kazuhisa Ishii in 2002.
At Southern University in 2012 led the Southwestern Athletic Conference with 103 strikeouts and the next season ranked second with 73 strikeouts...as a sophomore was All-SWAC...following the destruction in Puerto Rico caused by Hurricane Maria in 2017, organized a GoFundMe campaign that raised $10,000... also donated water, diapers and food...was on the island when Maria made landfall and wasn't able to leave Puerto Rico for 10 days.
Began the season on the Rays' injured list recovering from March 2018 "Tommy John" surgery to repair the torn ulnar collateral ligament in his right elbow...Made his first appearance on 5/4 for Charlotte...made 11 rehab apps for Charlotte and Durham before he was reinstated from the IL on 7/2...Made his 3 apps for the Rays on 8/14 at SD, 8/29 at Hou and 9/29 at Tor...Went 806 days between his Major League apps (5/29/17 at Tex & 8/14/19 at SD)...Earned his only win of the season in a 9-8 victory on 8/29 at Hou...entered that game in the sixth inning, trailing 6-5, but was credited with the win after the Rays took the lead in the top of the seventh...Made 2 starts for Durham in the International League's Governors' Cup finals, including Game 1...On 11/20, just minutes before the Rule 5 Draft reserve lists were due, was acquired by the Reds for cash and a player to be named.
Underwent Tommy John surgery on March 13, performed by Dr. James Andrews in Pensacola, Fla. …made 2 apps in spring training and was diagnosed with a torn right ulnar collateral ligament on March 8...Ranked by Baseball America as the No. 29 prospect in the Rays system following the season.
Spent the entire season in the minors aside from a one-day stint on May 29 at TEX…made his Rays debut that night and was credited the win by the official scorer…allowed 3 R/ER in 2.2 IP and his 69 pitches were the most by a Rays reliever since Chris Archer on Sep 13, 2012 at BAL (79).... Became the 11th pitcher in franchise history to win his Rays debut as a reliever and first since Andrew Bellatti on May 9, 2015 vs. TEX.... Limited to 10 apps (8 starts) in the minors due to three stints on the disabled list…started the season on the disabled list with discomfort in the flexor mass muscle…also missed time with a strained lat and forearm tendinitis.... Was initially slowed in spring training by back tightness.... Ranked by Baseball America as the No. 25 prospect in the Rays system following the season.... WORLD BASEBALL CLASSIC: Added to Puerto Rico's roster for the second round, replacing Jenrry Mejia…started against Venezuela and did not allow a run in 2.2 IP, with 5 SO…his strikeout victims included HOU José Altuve (twice), TEX Robinson Chirinos, KC Alcides Escobar and ATL Ender Inciarte.
Made 4 starts for the Dodgers in September, his first major league action…spent the remainder of the season with Triple-A Oklahoma City. Selected to the major league roster on Sep 4 and made his major league debut that night vs. SD, a 7-4 Dodgers win…his line: W, 6 IP, 5 H, 4 R/3 ER, 0 BB, 9 SO, 1 HR, 1 HBP, 86 pitches…was the youngest Dodger to win his major league debut as a starter since Nathan Eovaldi on Aug 6, 2011 at ARI…at 24, was the fifth pitcher since records are available (1913) to win his debut as a starter with 0 BB and 9 SO or more, first since WAS Stephen Strasburg on June 8, 2010 vs. PIT. Became the first Dodger to win the first 2 apps of his career as a starter since Kazuhisa Ishii in 2002…yielded 2 ER over 5 IP on Sep 16 at NYY, an 8-2 Dodgers win…was the first NL pitcher to win at Yankee Stadium within his first 2 career apps since FLA Aníbal Sánchez in 2006. Lasted just 3.2 IP and 2.1 IP in his next 2 starts, both no-decisions. Had a pair of DL stints with Oklahoma City due to ankle and shoulder injuries…went 7-1 with a 2.61 ERA, 111 SO, .194 opp avg. and 5.55 SO/BB ratio in 16 starts…named a Triple-A All-Star by Baseball America. Recorded double-digit strikeouts in 5 of his 16 minor league starts, including 3 straight immediately prior to his selection. Was a non-roster invite to Dodgers spring training…made 3 relief apps before being reassigned to minor league camp. Ranked by Baseball America as the No. 29 overall prospect in the minors entering the 2017 season…was the No. 3 prospect in the Dodgers organization and the No. 3 prospect in the Pacific Coast League following the 2016 season.