A scrambling threat at ECU, Carden added 24 rushing TDs, but has 4.94 speed and isn't a true dual threat.A weak-armed but tough prospect who will likely spend his NFL career holding a clipboard, Carden has been compared to Bruce Gradkowski by CBS Sports' Dane Brugler.Still, the tools are there for Evans to make a run at a backup job, possibly after spending a year or two on a practice squad.

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Now 34, Whitehurst has been an entertaining NFL presence, but never actually been good at football.

The second-year UDFA out of South Carolina completed 24-of-40 passes for 277 yards and a 2:2 TD: INT ratio last preseason.

He averaged 5.5 yards per rushing attempt and tacked on 44 rushing scores.

Fajardo is smart (31 Wonderlic) and a legitimate scrambling threat with 4.63 speed, but offers sub-par arm strength and accuracy, and doesn't react well under duress. Carden (6'2/218) was named the American Conference's Offensive POY by the league's coaches as a senior after completing 66.6 percent of his collegiate passes with an TD-to-INT ratio.

That gives the Bills a fourth quarterback behind Tyrod Taylor, E. He tried out for the Bills and Raiders last offseason but never earned a roster spot.

With Jones battling a sore shoulder, Trainor will probably get some run in Thursday's preseason finale against Detroit.

Neal set school records in passing yards (5,614) and touchdown passes (47) as a three-year starter at Concordia from 2012-14.

He spent last season in the German Football League, before catching the Saints' eye at Tulane's Pro Day last month.

Blackmon busted in the NFL due to repeated violations of the league's substance-abuse policy.

He has rarely been seen or heard from over the past few years. Blackmon will avoid jail time as long as he complies with the conditions set by an Oklahoma judge.

A streaky and often erratic passer with a strong arm, Evans played in a simplistic one-read college offense that manufactured big plays off play action, and is significantly dissimilar from a pro-style attack.