Sipp (oblique) returned to the mound Sunday, striking out the only batter he faced.

EDGE Analysis

Sipp missed an extended period of time due to back and oblique issues, but he finally returned to the mound Sunday, and he should be good to go moving forward.

Sipp (oblique) is set to rejoin the Astros this weekend, the Houston Chronicle reports.

EDGE Analysis

Sipp came out of a Wednesday bullpen session feeling fine, so he will join the Astros for their next series in Los Angeles. It's not yet clear when Sipp will make his next appearance for the big club however.

Sipp has a back/oblique concern and will go for further tests this weekend, the Houston Chronicle's Evan Drellich reports.

EDGE Analysis

It sounds like Sipp won't be available Friday, and possibly through the rest of the weekend. The Astros have plenty of bullpen reinforcements after roster expansion so they should be able to manage without Sipp in the short term.

Sipp (2-4) took his fourth loss of the season in relief after giving up a two-run homer to Hanley Ramirez during Sunday's 5-4 loss to the Red Sox. Sipp opened 2015 with a 0.79 ERA through 10 appearances in April, but he has allowed runs in nine of 23 appearances since then. The veteran southpaw maintains a respectable 3.26 ERA and 1.05 WHIP, however, with a 33:7 K:BB ratio over 30.1 innings.

Sipp (2-2) took his second loss of the season in relief after giving up a home run to Chris Davis during Wednesday's 5-4 loss to the Orioles. Sipp entered a tie game with one out in the bottom of eighth inning to play the lefty-on-lefty match up against Chris Davis. Davis is hitting .303 against left-handed pitching this year, however, and drove the first pitch he saw from the veteran reliever 436 feet over the wall in right center field. Despite allowing a home run in each of his last two appearances for the Astros, Sipp still sports a 1.53 ERA this season.

Sipp (2-1) took the loss in relief after giving up a walk-off solo home run to James McCann in the 11th inning of Thursday's 6-5 loss to the Tigers. Making his third appearance in three days for the Astros, Sipp didn't record an out in the game while his ERA doubled from 0.53 to 1.06 this season. Coming into Thursday, the veteran southpaw hadn't allowed an earned run in a game since April 11.

Sipp struck out both batters he faced to earn his sixth hold of the season Wednesday against the A's. The Astros were leading 3-1 when Sipp entered the game with a runner on second base and one out in the eighth inning, and he struck out Stephen Vogt and Mark Canha to prevent the run from scoring. He lowered his ERA to 0.53 with the scoreless appearance.

Sipp allowed a hit and struck out a batter during a scoreless inning of relief Tuesday against Oakland to pick up his fifth hold of the season. Sipp recorded two quick outs to open the seventh inning before permitting a single to Billy Burns, who he picked off at first base to end the frame. The veteran left-hander has a 0.55 ERA, .161 BAA and 16:3 K:BB ratio over 16.1 innings this season.

Sipp earned his second victory of the season in relief on Sunday, striking out a batter over 1.2 perfect innings against Oakland. Sipp (2-0) breezed through the heart of the A's lineup across his 1.2 innings Sunday, tossing 15 of his 19 pitches for strikes. Through eight relief appearances with the Astros this season, the veteran reliever has a 0.96 ERA, 0.764 WHIP and 7:2 K:BB over 9.1 innings.

Sipp pitched a scoreless inning Sunday against the Angels to earn his third hold of the season. The veteran southpaw allowed a leadoff single to Erick Aybar, who quickly advanced to second base on a wild pitch. Sipp worked around it though, striking out C.J. Cron before getting Collin Cowgill to pop out and Johnny Giavotella to ground out to end the inning. Through five relief appearances with the Astros, Sipp has a 1.42 ERA, 0.79 WHIP and 6:1 K:BB over 6.1 innings.