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8/31/2014 9:26 P.M. ET

Romo, Casilla to share Giants' closer duties

SAN FRANCISCO -- With Santiago Casilla doing a good job of creating late-game drama and Sergio Romo's unfair slider back to being unfair, Giants manager Bruce Bochy is opting to platoon the two in the closer role.

"I'll use them both," Bochy said Sunday. "We're going to ham and egg it with those two."

Casilla, who's been bothered by an illness lately, allowed a run and saw the Brewers bring the go-ahead run to the plate Saturday night before shutting the door on a 3-1 victory. He's been scored on in five of his 10 August appearances. He has a 4.66 ERA to go along with five saves in August.

Romo lost his closer's role in late June, but he hasn't surrendered a run since July 22, a span of 14 consecutive appearances. In 12 1/3 innings during that time, he's struck out 17 and allowed just six hits and three walks. The plan was for him to stay in the game after striking out the only batter he faced in the eighth Saturday night, but the pitcher's spot came up to bat in the bottom of the eighth.

So, the Giants are now back a two-person committee.

"He's using his fastball effectively, same with his slider and changeup and he's really hitting his spots well now," Bochy said of Romo on Sunday. "He looks very determined to get back on track, which he's done."

Giants add five players for expanded roster

SAN FRANCISCO -- After the Giants' 15-5 victory against the Brewers on Sunday, San Francisco took advantage of the opportunity to expand its roster with the arrival of September by calling up five players.

Lefty Mike Kickham and outfielder Juan Perez were recalled from Triple-A Fresno, and Grizzlies teammates infielder Chris Dominguez and catcher Guillermo Quiroz had their contracts purchased by the Giants.

To make room on the 40-man, Ehire Adrianza and Hector Sanchez were transferred to the 60-day disabled list.

Hunter Strickland, who has posted a 2.02 ERA in 38 appearances with Double-A Richmond, was also called up.

In 27 starts with Fresno this season, Kickham is 8-8 with a 4.43 ERA. Perez hit .175 with one home run and two RBIs in 63 at-bats earlier this season with the Giants. Dominguez hit .274 with 21 home runs and 85 RBIs in 131 games with the Grizzlies, while Quiroz hit .267 with three home runs and 23 RBIs in 69 games at Triple-A.

Lincecum rusty in two-inning relief outing

SAN FRANCISCO -- Perhaps the only sour note on an otherwise brilliant Sunday afternoon at AT&T Park for the Giants was the performance of Tim Lincecum.

The righty made his first appearance since his move to the bullpen in the eighth inning of the Giants' 15-5 victory against the Brewers. He gave up a solo home run to Ryan Braun in the eighth and was charged with two more runs in the ninth. He also hit Martin Maldonado with a pitch.

His final stat line? Two innings, three runs (two earned) on three hits. The rust was to be expected, manager Bruce Bochy said.

"It'd been awhile since he was out there, but he got some work in," Bochy said. "I thought his delivery was a little more balanced and aligned. Now, if we need him in a little more stressful situation, I think he will be a little more comfortable."

Worth noting

• A banged-up Buster Posey was held out of Sunday's lineup. The day game Sunday following Saturday night's game didn't do Posey any favors, but the bigger reason was the handful of foul-ball deflections he took while batting and behind the plate Saturday night.

"The one on the forearm was a pretty good one, and he got another on the leg," Bochy said Sunday. "He's got a lot of general soreness."

Bochy said Posey was available for use off the bench.

• Bochy said he isn't sure who will take the mound when the Giants and Rockies resume the game that was suspended May 22 on Monday afternoon.

Ryan Hood is an associate reporter for MLB.com. Follow him on Twitter @ryanhood19. This story was not subject to the approval of Major League Baseball or its clubs.