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9/2/2014 9:54 P.M. ET

Gray to sit out first round of Double-A playoffs

DENVER -- Rockies top prospect Jon Gray is dealing with shoulder fatigue and will not pitch in the first round of the Double-A Texas League playoffs. The news was first reported by The Denver Post.

The move is precautionary and Gray has an outside chance of pitching for Tulsa if the Drillers were to advance to the next round. But considering the organization has decided to play it safe with the 22-year-old right-hander, he seems highly unlikely to be a September callup.

On Monday, manager Walt Weiss said the Rockies would make additional callups once some of their Minor League affiliates finished their playoff circuits. Weiss singled out Tulsa as one of the teams set to be plundered, but this news essentially ensures Gray will not be in the mix.

Gray, the No. 3 overall selection in 2013, has gone 10-5 with a 3.91 ERA in his first season at the Double-A level. In 124 1/3 innings pitched, Gray has struck out 113 batters. He has also seen his walk total climb to 41 after only issuing 16 free passes in 74 2/3 innings last season.

Rockies have played it safe with Gray's pitch count all season long, never once allowing him to toss 95 or more pitches in an outing. In fact, before August, the Rockies only allowed Gray to break the 90-pitch barrier in four of the 20 games in which he pitched.

After limiting Northwest Arkansas to just two hits and one run in seven innings on Aug. 2, Gray only lasted a total of 12 1/3 innings over his final three starts. In what could end up being final start of the season, Gray only went two innings, surrendering three runs on five hits.

Kahnle returns from DL as Rox add reinforcements

DENVER -- As expected following his successful live bullpen session on Saturday, Rockies right-hander Tommy Kahnle was activated from the 15-day disabled list Tuesday.

Kahnle missed 25 games while dealing with right shoulder inflammation. Before being placed on the DL on Aug. 16, the Rockies' Rule 5 Draft selection from the Yankees was 2-1 with a 3.43 ERA in his first season in the Majors.

Despite the time off, Kahnle's 63 innings pitched still lead all Rockies relievers. Kahnle has also struck out the second most batters among Rockies relievers at 65, compared to just 16 walks.

In addition to activating Kahnle, the Rockies also recalled first baseman/outfielder Kyle Parker and right-hander Rob Scahill from Triple-A Colorado Springs. This will be the third stints with the Rockies this season for both Parker and Scahill.

Parker, the Rockies' No. 8 ranked prospect according to MLB.com, has hit .289 (145-for-502) with 30 doubles, 15 home runs, 72 RBIs and 73 runs scored in 128 games at the Triple-A level this season.

Parker hasn't had many opportunities for extended playing time with the Rockies since making his Major League debut earlier this season. In five games, the former first-round pick is 1-for-9 with five strikeouts.

Scahill has pitched to the tune of a 5.68 ERA (6 1/3 innings, four earned runs) across four games with the Rockies in 2014. In 33 games for Triple-A Colorado Springs, Scahill owns a 2-0 record and a 4.47 ERA across 48 1/3 innings pitched.

"It's good to have the reinforcements and be able to look at these guys for the last month of the season," manager Walt Weiss said. "September always makes for an interesting time."

Cody Ulm is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.