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9/27/2013 10:24 P.M. ET

Chatwood scratched, wraps up strong season

LOS ANGELES -- Rockies manager Walt Weiss scratched righty starter Tyler Chatwood from his scheduled start in Sunday's season finale because of stiffness in his right elbow. He missed August because of elbow inflammation.

Chatwood (8-5, 3.15 ERA in 20 starts) joins right-hander Jhoulys Chacin (14-10, 3.47 ERA in 31 starts) and lefty Jorge De La Rosa (16-6, 3.49 ERA) to mark the first time in the Rockies' 21-season history that the staff had three pitchers make 20 starts and post ERAs below 3.50.

Weiss said he is still mulling options for Sunday's start, and could piece the game together with bullpen members. Lefty Drew Pomeranz has pitched five scoreless innings of relief since returning from left biceps tendinitis, but Weiss said he could throw three innings at the most and isn't a candidate for a normal start.

Rockies deciding how to immortalize Helton's No. 17

DENVER -- The question isn't if the Rockies will retire Todd Helton's No. 17, Rockies owner and CEO Dick Monfort is simply trying to determine when to do it and where to hang the first retired number in franchise history.

Monfort said there wasn't a hard-and-fast policy about number retirements, although in the past it was believed the Rockies would refrain from doing so unless someone was elected to the Hall of Fame.

"We don't have a policy, we never have," Monfort said. "We'll study up on the protocol. What's the respectful thing to do? I don't know what's respectful. Do you wait a year? Do you do it the first game of the next year. Do you do it after he gets in the Hall of Fame? Do you do it on his birthday? Whatever it is, we'll just research it and figure it out."

The only other jersey number that comes up in the discussion is No. 33, worn by Larry Walker from 1995-2004. It has not been worn in a regular-season game, although the Rockies did issue it to pitcher John Maine in 2011. Maine, who was coming off an injury, wore it in Spring Training but his work for the organization consisted of 11 appearances at Triple-A Colorado Springs. The only unavailable number is 42, which was retired across the Majors to honor Jackie Robinson.

The Rockies have honored their former club president, Keli McGregor, by displaying his initials with a background of purple pinstripes on the right-field wall. McGregor died on April 20, 2010, of a rare virus that affected his heart muscle.

Monfort said he wants the jersey, and the honoring of McGregor, to be more visible. Monfort noted that the Dodgers place their retired numbers above the bleachers in left and right field.

"I always thought we should do something on that big deal on top [at Coors Field]," Monfort said. "We argued a lot about where to put Keli's display. We have to figure that out."

CarGo hopes to bat this weekend

LOS ANGELES -- Rockies All-Star left fielder Carlos Gonzalez took batting practice on Friday afternoon and is debating whether to take some at-bats during the series with the Dodgers or save testing his sprained right middle finger for Instructional League games in Arizona.

Gonzalez raised the idea of playing instructional ball last week in an interview with MLB.com, but he and manager Walt Weiss hope he can at least test it under the speed and adrenaline of a Major League game. If his finger responds without undue soreness, he will forgo surgery. He figures he must have the surgery by Nov. 1 in order to recover in time for Spring Training 2014.

"We're definitely going to test it, and I hope it will be this weekend," said Gonzalez, whose last at-bat was Aug. 4, before he finally went on the disabled list. He suffered the injury July 7.

Weiss said he doesn't plan on starting Gonzalez, but would like to see him have at least a couple of at-bats.

"That'll help us make a decision on whether or not he's going to have surgery," Weiss said. "If he goes in and takes some swings in a game and that thing flares up again, that gives us our answer."

Catcher Wilin Rosario's strained right calf muscle, which has kept him off the field since Sept. 17, didn't respond well to running tests Friday. Weiss said Rosario still holds hope of playing. Lefty Jorge De La Rosa, out with a bruised left thumb, will not return to the mound this season.

Thomas Harding is a reporter for MLB.com. Read his blog, Hardball in the Rockies, and follow him on Twitter @harding_at_mlb. This story was not subject to the approval of Major League Baseball or its clubs.