"Chatty had some tightness in his elbow, so we wanted to get him out at that point," Rockies manager Walt Weiss said after his club won 5-4 at Chase Field on a ninth-inning homer off the bat of Drew Stubbs. "We'll re-evaluate him tomorrow."
Asked if he expected Chatwood to undergo an MRI, Weiss reiterated, "Not at this point. We'll re-evaluate tomorrow."
Chatwood walked Aaron Hill, allowed an Eric Chavez single and walked A.J. Pollock to load the bases. After throwing ball one to Chris Owings, Rockies trainers and Weiss went to the mound and removed him in favor of right-hander Chris Martin.
"I was going to give [Chatwood] another hitter because he's been one of our best ground-ball guys," Weiss said. "It's a tough spot to bring in a kid with the bases loaded and nobody out. I was going to give Chatty an opportunity to get a double-play ball and then go from there. It worked out where Martin came into the game and was fantastic."
After an extended warmup, Martin retired the next three batters on six pitches to get out of the jam.
Martin came on with a 1-0 count to Owings, who jumped on the first pitch and grounded to third baseman Nolan Arenado who turned it into an easy force at the plate. Pinch-hitter Roger Kieschnick struck out and Tony Campana grounded out.
Chatwood already spent a stint on the disabled list this season because of a strained left hamstring suffered while running the bases near the end of Spring Training. He was reinstated on April 13 and is 1-0 with 4.50 ERA this year in four starts.
Barry M. Bloom is national reporter for MLB.com and writes an MLBlog, Boomskie on Baseball. Follow @boomskie on Twitter. This story was not subject to the approval of Major League Baseball or its clubs.