The question of which quarterback should be third off the board after Florida State's and Oregon's is one of the big debates in the lead-up to the 2015 .Some believe it will be Colorado State's , while others think UCLA's is the guy.Far more believe Baylor signal-caller will be the third QB taken in the draft, and the will be working him out in Waco, Texas, on Saturday, .The workout isn't all that surprising considering the interest the team has in selecting a quarterback. Head coach Jeff Fisher revealed last month that the Antonio Callaway Jersey team .Petty would be an interesting option for the club on Day 2 (Rounds 2-3) of the draft. He ranks third among quarterback in NFL Media analyst . Kadarius Toney Jersey He has plenty of natural arm talent and good upside given his athleticism. Still, he's a bit of a project considering there's a big transition from Baylor's spread offense to what he'll be asked to run in the NFL.Of course, the have a veteran QB in , and Petty wouldn't have to play right away if he ended up in St. Louis.There's been some speculation that the are in the mix to take Mariota, but if they end up pa sing on Mariota with their first-round pick (No. 10 overall), the franchise could certainly take someone like Petty in the second or third round.You can follow Bryan Fischer on Twitter at .