PHILADELPHIA (AP) -- Donovan McNabb might not have surgery on the broken right ankle that could sideline him for the rest of the regular season.

The Eagles' quarterback returned to Philadelphia on Thursday with a cast on the ankle after meeting with a specialist in Houston. McNabb will wear the cast until he is examined again in about two weeks.

Although he could have surgery then, McNabb most likely will let the bone heal on its own, even though an operation might allow him to return to action earlier.

He was hurt on the third play of Sunday's 38-14 victory over Arizona but stayed in for most of the rest of the game.

Koy Detmer, who hasn't started a game in three years, will guide the NFC East-leading Eagles (7-3) against San Francisco on Monday night.