NFL OTA roundup: Arian Foster undergoes MRI, Frank Gore sits for unknown injury

The extent of the injuries to Arian Foster and Frank Gore are unknown. Meanwhile, Adrian Peterson is apparently shipshape after undergoing sports hernia surgery in February. Those stories and more in Wednesday's OTA roundup.

By Louis Bien@louisbien May 29, 2013, 7:50pm EDT

Arian Foster underwent an MRI on his strained right calf Tuesday after being forced to leave practice. It is unclear whether the Houston Texans are being overly cautious or if Foster truly suffered a serious injury. He reportedly had to be helped off the field, and had his calf wrapped in ice before being carted from the sideline.

While the Texans wait to find out what's wrong with Foster, Ben Tate will be taking the majority of the first-team handoffs out of Houston's offensive backfield. While Tate has proven plenty capable in the past, Foster's long-term absence would be a big blow to the Texans. Foster rushed for 1,424 yards and 15 touchdowns on 351 carries last season.

Here's what else you may have missed Wednesday:

Frank Gore sits 49ers practice for unknown injury

Frank Gore sat out of practice for the San Francisco 49ers on Tuesday due to an injury. The exact ailment is still unknown, however. Head coach Jim Harbaugh wasn't any help:

"Just working through something," Harbaugh said. "Nothing too serious."

Coaches have no obligation to be forthcoming during OTAs, so don't expect to hear much more about Gore unless the injury turns out to be truly serious. The 49ers have been plagued by injuries this offseason, most notably losing wide receiver Michael Crabtree to a torn Achilles tendon. Left tackle Joe Staley is also sitting out practice to recover from offseason arthroscopic knee surgery.

Adrian Peterson back in practice after sports hernia surgery

Adrian Peterson continues to prove that he may have the best healing powers of any player in the NFL. He's already back on the practice field after undergoing surgery for a sports hernia in February.

The hernia stemmed from an abdominal strain Peterson suffered in Week 11 against the Detroit Lions. He continued to play despite the injury, racking up 861 yards rushing over his final five games. As you're probably well aware, Peterson fell just nine yards short of breaking Eric Dickerson's single-season NFL rushing record. Peterson finished with 2,097 yards rushing and 12 touchdowns on 348 carries on his way to earning AP NFL MVP and Offensive Player of the Year honors.

Tony Gonzalez, Roddy White sit out Falcons OTAs

Tony Gonzalez and Roddy White were listed as no-shows for the Atlanta Falcons' voluntary OTAs this week. Neither player is suffering from a known injury. It's more likely the two veterans are getting some much-needed rest before training camp.

Gonzalez is 37 years old, and decided to return to Atlanta this season after flirting heavily with retirement. The only thing missing from his Hall of Fame career is a Super Bowl ring. White, 31, is coming off his sixth consecutive season with at least 80 receptions and 1,100 yards receiving.

Mikel Leshoure, Ryan Broyles among injured Lions

Running back Mikel Leshoure and wide receiver Ryan Broyles are two of the more notable absences from the Detroit Lions' OTAs this week. Leshoure is dealing with a nagging sore hamstring, while Broyles is still recovering from the torn ACL he suffered last season.

The Lions hoped that Leshoure could become an every-down back when they drafted him in the second round of the 2011 NFL Draft. He missed his rookie year due to a torn Achilles tendon, however, then averaged just 3.7 yards per carry on his way to 798 yards in 14 games last season.

Broyles broke out with a 126-yard effort against the Houston Texans on Thanksgiving Day last season. He then tore his ACL the next week against the Indianapolis Colts. The Lions still hope he can be a reliable option, but he has a ways to go in his recovery.