Jimmy Garoppolo hasn't been terribly impressive this season, tallying 925 passing yards through four weeks. Darren Yamashita-USA TODAY Sports

San Francisco 49ers fans might be eager for a quarterback change, but coach Kyle Shanahan does not seem inclined to bench Jimmy Garoppolo as long as he’s healthy.

Garoppolo left Sunday’s game against Seattle at halftime with a calf injury and did not return for the second half. He was replaced by rookie Trey Lance, who threw for 157 yards and two touchdowns in a 28-21 defeat.

Shanahan made clear, however, that he still views Garoppolo as his starter following the game. The coach added that he had hoped to be able to give Lance more time before throwing him into action full-time.

Garoppolo said after the game that he hoped to miss only a couple weeks, suggesting Lance will have to make at least one start instead.

The veteran quarterback hasn’t been terribly impressive this season, tallying 925 passing yards through four weeks. There’s no doubt the injury comes at a frustrating time for him. He already seemed annoyed about sharing snaps with Lance, and the fact that the 49ers will get a longer look at the rookie while Garoppolo is sidelined might not be good news for the veteran.

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