I will preface this by saying that I'm assuming that Winston, Mariota, and Cutler are not realistic options.
After them, I think Mike Glennon is our best option as the QB to put BEHIND Bradford. This is a kid that just turned 25 and at the end of his second season, he has 29 TDs to 15 Ints in just over a season worth of games/attempts. Young QBs tend to get better. Especially ones that played under two different HCs and under two different systems in their two years. I don't know why the Bucs started Josh McCown this year but it was a colossal mistake. They should have stuck with Glennon for the season and saw what he could do.
I went back and reviewed all of Glennon's starts this year on NFL Rewind and I don't understand what they were thinking. He's not a perfect QB. I'm not saying that I think he has elite potential. And to be entirely honest, I wasn't overly high on him as a prospect.
That all said, he showed more than enough this year and last year for me to believe that he has a future in the NFL. As it stands now, I think Glennon offers an extremely similar skill-set to that of Nick Foles. I think his floor in this league is carving out a year as a Kyle Orton type player...great backup/decent enough spot starter. But I do think he has the upside to be a starting caliber QB...a player similar to what Carson Palmer was this year in Arizona.
I'll tell you this, Glennon is a QB who would have no issues finding Tavon over the middle of the field. At 6'7" 230, he's able to see over the OL/DL without any issue and would actually be taller than all of our starting OLs.
On top of his height, Glennon has functional mobility in the pocket with good instincts and effective movement. He helps out his OTs by either delivering the ball at the top of his drop or climbing in the pocket to allow them to push the rush past him. Because of his size, he's confident climbing the ladder and moving within the pocket to create space and buy time. Glennon also shows the ability to anticipate routes and throw to spots rather than his WRs. His timing on passes is good for a young QB and he generally is a sound decision maker. He also has a quick release for such a tall passer and has a good understanding of touch.
The negatives for Glennon are that he doesn't have an outstanding arm. It's adequate but some of the more difficult throws get a bit more air on them than you'd like. Glennon also isn't very mobile. He's able to buy time in the pocket with his feet, instincts, and technical skills but he won't win many foot races and is no threat to run...although he does have enough mobility to improvise outside the pocket. On top of all this, his deep ball is inconsistent from game to game, he locks onto WRs at times, and his footwork needs cleaning up. His drops are a tad sloppy and methodical. He also can get sloppy with his feet in the pocket.
Still, watching this kid play, it left with a lot of disappointment in Lovie Smith...a coach I respect. I've seen QBs that just can't hang in the NFL. Mike Glennon is not one of those guys. I see NFL skills in his game and I see starter potential. He has some of the most important qualities for the position and I think that Tampa Bay did themselves a disservice not seeing what he could offer.
But Tampa Bay has the #1 pick and is likely going to draft a QB. If they do that, they have no reason to keep Glennon. I think Glennon would definitely be worth trading a 5th for. He'd give us valuable depth behind Bradford and he'd give us a guy who actually has potential if Bradford goes down. Most of all, he's a good scheme fit for our offense and a kid who still has upside that, imo, was mistreated by a new regime because he wasn't their guy. That's what got us Joe Barksdale and I'm hoping it'll be what gets us Glennon because he's our best option behind Bradford for the 2015 season(assuming what I said in the first sentence is true).
There are some Tampa Bay Rams fans on here that might disagree with my observations. And you guys are absolutely entitled to that. But I promise you this, I did take the time to watch him very closely.