Miami Dolphins Pro Bowl center Mike Pouncey underwent hip surgery Monday and running back Knowshon Moreno will undergo arthroscopic knee surgery this week, according to reports Monday.

ESPN.com reported Pouncey is expected to miss at least three months and Moreno will miss four to five weeks.

Moreno, after a career year in Denver last year with 1,038 rushing yards and 10 touchdowns, signed a one-year $3 million contract with the Dolphins this offseason, with $1.25 million guaranteed.

The Dolphins hope to have Moreno back in time for the start of the preseason, but Pouncey is expected to be sidelined for the start of the regular season.

Pouncey tore the labrum in his hip sometime during the Dolphins' OTA sessions. The 6-foot-5, 305-pound Pouncey was the lone holdover from the Dolphins' 2013 starting offensive line.

Pouncey has missed just two games since being drafted by the Dolphins in the first round of the 2011 draft. He was forced to miss those games last season while dealing with a gallbladder issue.

Pouncey's status for the season opener was uncertain because of his involvement with the Dolphins' bullying scandal in 2013.

Pouncey, Richie Incognito and John Jerry were named by the Ted Wells report as the three individuals who created a bullying work environment for former teammate Jonathan Martin, and a team trainer. Wells labeled Pouncey as uncooperative in his report to the NFL.

Pouncey was required by the NFL to undergo a mental health evaluation for his participation in the controversy.