SCOTTSDALE, Ariz. -- Rockies righty reliever Jairo Diaz hopes to learn on Monday what caused the discomfort near his right elbow during a game appearance Saturday.
Diaz, whose fastball nears 100 mph, knew something was wrong while facing his last two hitters in the Rockies' 9-5 victory over the Padres. He gave up three runs on three hits and allowed three walks in 2/3 of an inning.
• Rockies Spring Training info
Diaz said Sunday morning he felt better, but is concerned about results of an MRI.
"Yesterday I got the MRI and they saw something wrong, but I don't know what's wrong," Diaz said. "I didn't feel anything was bothering me, just the last couple hitters."
Manager Walt Weiss said he noticed Diaz "didn't look right," and removed him in short order. Diaz, who turns 25 in May, went 0-1 with a 2.37 ERA in 21 appearances late last season, after spending much of the year at Triple-A Albuquerque.
• Left-handed starter candidate Chris Rusin, nixed from a start Friday because of left middle finger inflammation, felt better Sunday and should resume throwing.
• Righty David Hale did some running after Saturday's 25-pitch bullpen session. Hale will have to practice fielding and covering first base before being cleared for Cactus League games, Weiss said.
• Outfielder Gerardo Parra was removed from Saturday's game with right ankle/heel soreness, but he reported feeling fine Sunday and Weiss said he removed Parra only for precautionary reasons.
Thomas Harding is a reporter for MLB.com. Follow him on Twitter @harding_at_mlb, listen to podcasts and like his Facebook page. This story was not subject to the approval of Major League Baseball or its clubs.