The NFL combine is upon us. This weekend in Indianapolis college prospects workout in shorts and t-shirts -- hoping to impress teams ahead of May's draft. Your Houston Texans have the pole position, but they may trade out of it.

Sportstalk 790 football guru Lance Zierlein says the Texans are definitely interested in a quarterback.

"There'll be three quarterbacks I'm sure that they look at very closely; Blake Bortles from Central Florida, Johnny Manziel from Texas A&M and Teddy Bridgewater from Louisville."

Of those three only Bortles is expected to throw this weekend, but Zierlein likes Johnny Football.

"I'd take a very, very close look at Johnny Manziel. I think Johnny Manziel from a football standpoint -- not just an excitement standpoint -- but I think from a football standpoint he's a good fit."

Zierlein says the Texans would probably like to trade down and pick up more players, but that may not be possible. Texans' brass is Indianapolis and unavailable for comment.