Oscar is in his seventh season in the Cubs organization since signing with the club as a non-drafted free agent in October of 2012 ... was placed on the restricted list July 6, 2018 after being suspended for violating MLB's Joint Drug Prevention and Treatment Program (80 game suspension) ... Was ranked as the sixth-best prospect by Baseball America entering 2018 ... was the fifth-best prospect entering 2017 and the eighth-best prospect entering 2016 ... Has gone 26-17 with a 3.39 ERA (125 ER/332.0 IP) in 69-career minor league games, all but four as a starter ... reached the Double-A level in 2018 with Tennessee ... Was named a mid-season and year-end All Star in 2015 with Single-A Eugene ... has twice earned Pitcher of the Week honors ... A native of the Dominican Republic, Oscar made his pro debut in 2013 with the Dominican Summer League Cubs.
Oscar made his first appearance at the Double-A level, going 6-7 with a 5.24 ERA (45 ER/77.1 IP) in 16 games, including one complete game ... Pitched 7.0-scoreless innings May 26 at Pensacola, allowing just five hits and striking out seven ... Struck out a season-high 10 batters in 5.2-scoreless innings, May 5 vs. Birmingham ... Was suspended 80 games on July 6 for violating Major League Baseball's Joint Drug Prevention and Treatment Program ... missed the remainder of the season.
Oscar went 4-3 with a 3.46 ERA (21 ER/54.2 IP) in 12 starts with Single-A Myrtle Beach, his first appearance at the high-A level ... also made one rehab appearance with rookie league Mesa, tossing 2.0-scoreless innings... Was placed on the disabled list, May 30, with a chest injury ... was activated, August 24, after a rehab outing with Mesa... Tossed a 7.0-inning complete game shutout, May 14 vs. Lynchburg ... allowed just five hits and walked none... Went 3-0 with a 2.63 ERA (7 ER/24.0 IP) in four May starts prior to his injury.
Limited to just nine games after beginning the season on the disabled list ... made his season debut July 13 ... went a combined 1-3 with a 3.00 ERA (13 ER/39.0 IP) between Mesa, Single-A Eugene and Single-A South Bend... Made six starts with South Bend, going 1-2 with a 3.25 ERA (10 ER/27.2 IP) ... struck out 35 batters while walking eight ... did not allow a homer... Named Midwest League Pitcher of the Week for August 8-14 after tossing 5.0-scoreless innings... Allowed just one earned run in 8.1 innings across two starts with Eugene.
In his first season in the United States, he went 6-3 with a 2.84 ERA (23 ER/73.0 IP) in 13 starts with Single-A Eugene ... earned mid-season and year-end All-Star honors as he tied or set team-highs in wins, innings pitched and strikeouts (73)... Held the opponent to one or zero runs in seven of his 13 outings... Named the Cubs Minor League Pitcher of the Month for August after going 3-1 with a 2.73 ERA (9 ER/29.2 IP) in five starts ... he also earned Northwest League pitcher of the week honors for August 24-30 after striking out a career-high 13 batters in 7.0 innings, August 26 vs. Spokane.
Pitched a career-high 75.0 innings with the DSL Cubs, going 8-1 with a 1.80 ERA (15 ER/75.0 IP) in 14 starts .... allowed one or zero earned runs in each of his first nine starts.
Oscar made his pro debut with the DSL Cubs, appearing in four games, including one start ... went 1-0 with a 6.55 ERA (8 ER/11.0 IP).