Three wide receivers -- West Virginia's , Alabama's and Louisville's -- are consensus top-20 talents in this draft, but while NFL Media analyst Mike Mayock said Monday there is "depth throughout" the wide receiver cla s, there also are some questions outside of the top three. Five wide receivers went in the first round last season, and Mayock pointed out that all five -- Jr., , , and -- were big-time producers as rookies. On a teleconference in advance of the NFL , Mayock also pointed out that it wasn't just "the guys up top" who produced as rookies, mentioning , and , among others. After the top three this year, while there is talent, there are "a bunch of question marks," Danny Green Jersey Mayock said. He mentioned , who is physically gifted but has had off-field i sues, to the extent that he was dismi sed from Mi souri and didn't play a down at Oklahoma this past season. Mayock also brought up Michigan's , who is athletic but was a tight end in his first two seasons and played wide receiver for just one season. Mayock mentioned Auburn's , Miami's and Ohio State's as wide receivers who will run "4.35 or better" in the 40-yard dash at the combine. But there are questions about the productivity of all three, with Coates having i sues with drops. Mayock said he is a fan of Arizona State's . "He's big, he's strong. ... What he runs this week (in the 40) is going to be important," said Mayock, who has Strong as a second-round pick. Mayock also said Strong has the "physical traits" of a , but he's "not anywhere close from a technique perspective" to Fitzgerald.Mayock also brought up UCF's , a junior who has "first-round talent" but remains somewhat under-the-radar. Mike Huguenin can be reached at mike.huguenin@nfl.com. You also can follow him on Twitter . Muggsy Bogues Jersey