The Colorado Rockies placed relief pitcher Rafael Betancourt on the 15-day disabled list with a sprained right elbow, the team announced on Friday. The Rockies also designated fellow reliever Edgmer Escalona for assignment in an unrelated move.
Betancourt was pulled in the ninth inning of Colorado's 5-4 loss to the Philadelphia Phillies on Thursday after allowing the game-tying run on an infield single. The 38-year-old closer initially felt pain after his blown save against the Phillies on Wednesday, according to Troy Renck of the Denver Post, but tried to pitch through it.
The Rockies fear Betancourt might have torn his ulnar collateral ligament, which would result in season-ending Tommy John surgery.
Betancourt has posted a 4.08 ERA with 16 saves for Colorado in 2013. For the third straight season, he has seen an increase in his walk rate while facing a decline in strikeouts.
Escalona, 26, struggled to the tune of a 5.67 ERA while allowing eight home runs in 46 innings of work. The right-hander has a career 4.50 ERA in 78 big-league appearances.