Source: Interest in Tomsula as head coach

The San Francisco 49ers potentially could see multiple coaches emerge as NFL head-coaching candidates this month.

A league source said some teams (there are currently six teams without a head coach) are beginning to do background work on defensive line coach Jim Tomsula. He could emerge as a candidate in the next week. As per league rule, coaches in the wild-card round (the 49ers play at Green Bay on Sunday) can’t interview this week.

Tomsula could be considered a long-shot because he’s never been a NFL coordinator. However, coaches such as Andy Reid and John Harbaugh have become successful head coaches after making the jump from an NFL positional coach.

He does have experience as a head coach in NFL Europe. Tomsula, known for an energetic personality and positive attitude, is one of the more respect defensive line coaches in the NFL.

If continued interest in Tomsula develops, he’d join offensive coordinator Greg Roman as a possible head-coach candidate. Roman’s name is floating around as a possible candidate in several spots as it did last year.

Meanwhile, USC has announced 49ers’ offensive line coach Tim Drevno will become offensive line coach at the school after the 49ers’ season ends. He has been with 49ers coach Jim Harbaugh for 10 years. The team still has offensive line coach Mike Solari. The 49ers will likely fill the role in the offseason.