|Colorado Rockies – No. 44|
August 31, 1986 |
San Francisco de Macoris, Dominican Republic
|Bats: Right||Throws: Right|
|May 28, 2011 for the Colorado Rockies|
(through May 19, 2013)
|Earned run average||4.60|
He began his professional career in 2006, pitching for the DSL Rockies and going 2–1 with a 2.89 ERA in eight games (five starts). With the Casper Rockies in 2007, Nicasio went 0–3 with a 4.36 ERA in 13 games (eight starts). In 2008, he pitched for the Tri-City Dust Devils and went 2–4 with a 4.50 ERA in 12 starts. With the Asheville Tourists in 2009, Nicasio went 9–3 with a 2.41 ERA in 18 starts, striking out 115 batters in 112 innings of work. He began the 2010 season with the Modesto Nuts.
On May 28, 2011, Nicasio was recalled from Double-A Tulsa to take Jorge de la Rosa's rotation spot. Bruce Billings was optioned to Triple-A Colorado Springs to make room. He made his debut that day, facing the St. Louis Cardinals, pitching seven innings while giving up one unearned run. The Rockies won 15–4, giving Nicasio his first major league win. His first major league strikeout was of Jaime García. In total, Nicasio gave up six hits, walked two and struck out two.
On August 5, 2011, while pitching in a game against the Washington Nationals, Nicasio was struck in the head by a line drive off the bat of Nationals' shortstop, Ian Desmond. Nicasio lost his balance and fractured a vertebrae in his neck when he fell to the ground. The incident has been mentioned by commentators covering Major League Baseball's investigation into how to protect pitchers from batted balls. 
Nicasio returned to the mound for the Rockies in 2012 and made 11 appearances. Nicasio injured his left knee while fielding a ground ball during a game on June 2, 2012. In July 2012, Nicasio underwent arthroscopic surgery on his left knee and missed the remainder of the 2012 season.
- BR Minors
- Oates, Russ (2011-05-28). "Cardinals vs. Rockies: Juan Nicasio Makes Major League Debut For Colorado". SB Nation Denver. Retrieved 2011-05-28.
- Harding, Thomas (2011-05-28). "Iannetta, Nicasio key big Rockies win". MLB.com. Retrieved 2011-05-29.
- Career statistics and player information from MLB, or ESPN, or Baseball-Reference, or Fangraphs, or The Baseball Cube, or Baseball-Reference (Minors)