Whitley was placed on the 15-day injured list Sunday due to a left knee sprain, Julia Morales of AT&T SportsNet Southwest reports.

EDGE Analysis

The right-hander was activated from the injured list last weekend after missing the first few weeks of the season with a bone bruise in the same knee, but he felt something was off while playing catch Saturday and is now back on the shelf after making just one appearance. A return timeline could come into focus Monday once Whitley is further evaluated.

The Astros reinstated Whitley (knee) from the injured list Saturday, Chandler Rome of The Athletic reports.

EDGE Analysis

Whitley landed on the injured list at the start of the season due to a bone bruise in his left knee. He has since made four rehab appearances at Triple-A Sugar Land, allowing three runs while striking out five batters and walking four over 3.2 innings. He'll almost certainly work in low-leverage situations for the Astros; meanwhile, Nick Hernandez will head back to Triple-A.

Whitley (knee) will pitch an inning or more Wednesday with Triple-A Round Rock, MLB.com reports.

EDGE Analysis

Whitley has made three appearances with Round Rock, including back-to-back outings Saturday and Sunday. In total, he's thrown 2.2 frames while recording two strikeouts and one walk. Whitley is expected to be activated shortly after his rehab appearance.

Whitley (knee) tossed a scoreless inning Wednesday in his first rehab appearance with Triple-A Sugar Land.

EDGE Analysis

Whitley got a late start to the season due to a left knee bone bruise that he suffered in early March. The big right-hander will likely require a handful of rehab outings before returning from the 15-day injured list.

The Astros placed Whitley on the 15-day injured list Thursday with a left knee bone bruise, Brian McTaggart of MLB.com reports.

EDGE Analysis

Whitley suffered the injury during an early-March Grapefruit League outing. He has continued throwing, but there's no indication as to when he might be ready to begin a rehab assignment.

Manager Joe Espada confirmed Saturday that Whitley (knee) will start the season on the injured list, Matt Kawahara of the Houston Chronicle reports.

EDGE Analysis

Whitley suffered a bone bruise in his left knee March 8 but has since resumed throwing, hitting 95 mph off flat ground Saturday, per Brian McTaggart of MLB.com. Whitley doesn't seem to be in any discomfort while throwing and will utilize his time on the injured list to make up for lost reps, which bodes well for his chances of returning after a minimum-length stay.

Whitley (knee) is not likely to be on the Astros' Opening Day roster, Matt Kawahara of the Houston Chronicle reports.

EDGE Analysis

Whitley suffered the injury in a Grapefruit League game in mid-March and there has been no news of him resuming throwing or other baseball activities. However, general manager Dana Brown did say he expects Whitley to be available at some point in April.

Manager Joe Espada said Thursday that Whitley has a bone bruise in his left knee and will hold off on throwing for a couple of days, Chandler Rome of The Athletic reports.

EDGE Analysis

Whitley reportedly suffered the injury during his appearance Saturday against the Yankees. There's currently no telling if his injury will prevent him from being ready for Opening Day, though a timetable could be established once he's cleared to begin throwing. The 27-year-old righty had been having a solid camp prior to getting hurt, allowing one earned run in five innings while striking out five batters and walking four.

The Astros optioned Whitley to Triple-A Sugar Land on Thursday, Matt Kawahara of the Houston Chronicle reports.

EDGE Analysis

Whitley allowed two unearned runs while striking out five over 2.2 innings in a couple appearances this week. He threw 48 pitches in Wednesday's blowout loss to the Reds, so the Astros will swap him out for a fresh arm.

The Astros recalled Whitley from Triple-A Sugar Land on Sunday.

EDGE Analysis

Whitley will receive his first look in the majors since mid-April, when he allowed a hit and a walk in a scoreless two-thirds of an inning during his MLB debut. The right-hander has been an effective bullpen piece at Sugar Land this season with a 2.17 ERA, 1.14 WHIP and 40:9 K:BB across 29 innings.