SANTA CLARA -- The scapula injury suffered by fullback Bruce Miller against the Buccaneers "doesn't look good," 49ers coach Jim Harbaugh said Monday.

Harbaugh said the 49ers intend to bring in fullback Owen Marecic at some point soon as a means of seeing if he's the best option to fill the void created by Miller's injury.

There's a distinct possibility that Miller will be lost for the season, though Harbaugh declined to give specifics. He got hurt Sunday.

"I have a pretty good idea but I won't say anything officially," Harbaugh said of how much time Miller is expected to miss. "It doesn't look good. It's something he'll heal from."

The 49ers have two regular-season games left before the playoffs start. As of now, the 49ers are in line to make the playoffs for the third straight season.

If so, they likely will forge on without Miller, a key blocker, receiver and short-yardage back.

Marecic was with the 49ers earlier this season, though he didn't play in any regular-season games. He got released in early October.

The plan for now is for Marecic to "come in, go through a physical, see where he's at with his conditioning, etc." Harbaugh said.

Marecic played in 24 games for the Cleveland Browns in 2011-12. He also played under Harbaugh at Stanford.