ANAHEIM -- Huston Street has been sidelined with a right groin injury since July 5, but an MRI exam also revealed a mild rotator cuff strain in his right shoulder, Angels general manager Billy Eppler said Tuesday.
Street, who will be cleared to throw once his symptoms subside, has been undergoing treatment and said he hopes to pitch again this season. Still, Eppler refrained from offering a timeline for his return, citing a lack of information.
"Right now, I'm not at a point where we're kind of assessing the end point," Eppler said, "Still just gathering some information. As more information comes in, I'll probably be able to give you a better estimate on that."
Injuries have limited Street to only four innings this year, as he also missed nearly three months with a lat strain. The 33-year-old veteran is a potential free agent at the end of the year, with a $10 million team option for 2018 or a $1 million buyout.
Skaggs, Heaney take steps forward
Left-hander Tyler Skaggs made his fourth rehab start on Monday, allowing three runs on five hits while walking three and striking out five over 4 2/3 innings with Triple-A Salt Lake.
Skagg's next outing is scheduled for Saturday, though the Angels have not yet determined if he will continue his rehab assignment with Salt Lake or return to Anaheim to fill the void in the Halos' rotation left by the injured Alex Meyer.
"We're going to evaluate him," manager Mike Scioscia. "Either he pitches down there and gets little more fine-tuned, or he's with us. We're going to wait until we get some more information, see how he feels and see what's happening."
Fellow southpaw Andrew Heaney, who is now 13 months removed from Tommy John surgery, made his first rehab start with Salt Lake on Tuesday and surrendered three runs on five hits while walking none and striking out seven over five innings.
"He got a glowing report from [Triple-A pitching coach] Erik Bennett and [Triple-A manager] Keith Johnson on how he looked this afternoon," Scioscia said. "Velocity touched 93, but he was in the range you're looking at. Pitched five strong innings. I think out of the 15 outs he got, he struck out seven guys. He did well."
Barring any setbacks, Skaggs and Heaney are both on track to rejoin the Angels' rotation by the end of the month.
Calhoun day to day
Right fielder Kole Calhoun remains day to day with a sore right hamstring, as an MRI exam on Monday revealed "between a spasm and a Grade-1 strain," according to Eppler. Calhoun injured his hamstring while running the bases in the Angels' loss to the Blue Jays on Sunday and exited the game, though he said he felt better and has already resumed hitting.

With Calhoun likely to miss a few days, the Angels called up outfielder Ramon Flores from Triple-A Salt Lake and had him start in right field on Tuesday against the Phillies. Flores, 25, was batting .311 with five home runs and 55 RBIs in 88 games with Salt Lake this season.
Worth noting
• Cameron Maybin (sprained right knee) ran the bases on Monday and is getting closer to beginning a rehab assignment.
"Being positive, I think things are definitely looking up," Maybin said.
• Garrett Richards (biceps strain) and Matthew Shoemaker (forearm strain) have progressed to throwing from 200 feet in their long-toss programs. Both are hoping to begin mound work soon. Meyer (right shoulder inflammation) was also cleared to resume throwing.
• The Angels optioned Brooks Pounders to Triple-A and recalled Eduardo Paredes from Triple-A Salt Lake ahead of Tuesday's series opener against the Phillies.