"There's a limit that they probably have in mind, but I think we're just going to go on how I feel, if I'm still strong or if I'm getting fatigued," Chatwood said.
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No cases are alike, but a guideline might be the way the Rockies monitored lefty Jorge De La Rosa after his 2011 Tommy John surgery. De La Rosa threw three Major League games at the end of 2012. In his comeback year of 2013, the Rockies held him to 167 2/3 innings, and he went 16-6 with a 3.49 ERA.
Manager Walt Weiss said the Rockies will pay special attention to Chatwood's early-season workload.
"We'll trust our eyes on that one," Weiss said. "We're going to be on top of that one. He's been bouncing back really well. We've been really pleased with that."
Other than reducing the number of throws, Chatwood said his between-starts maintenance is much like before the injury.
Anderson working his way back
Lefty starting pitching prospect Tyler Anderson, who suffered a right oblique strain before a scheduled start against the Brewers, said he is getting close to feeling healthy enough to throw.
Patience is difficult for Anderson. He seemed close to the Majors after a big 2014 at Double-A Tulsa (7-4, 1.98 ERA), but a stress fracture near his left elbow cost him all of last season. Still, he understands the danger of a setback.
"It was frustrating at first, but I gave myself a couple of days to be upset, then after that I moved on," Anderson said. "The longer you dwell on something, the worse it is. I'm just looking forward to coming back and feeling good. Everyone says take your time coming back because [injuries] can tend to nag a little while."
• Weiss will use the Rockies' day off Wednesday to fly to California to watch his son, Brody, play for Riverside City College against Santa Barbara City College.
"Spring Training, the hours are tough and it's too long and all that stuff," Weiss said. "It doesn't sound exciting getting on a plane tomorrow. But I get a chance to see my kids play. They're few and far between."
• Righty Jordan Lyles is scheduled to start a Minor League game Wednesday. Also Wednesday, lefty Chris Rusin, who hasn't pitched because of left-middle finger inflammation, will have his second live batting practice session.