Richard Mullaney is a good receiver, but lacking game changing ability like Cooks, he’s more of a complimentary receiver than a true #1. When Markus Wheaton moved on to the NFL, Cooks was the clear successor. With Cooks moving onto the NFL, the situation is more murky.
My candidate is Hunter Jarmon
http://www.hudl.com/athlete/448909/highlights/11418374
I had him ranked as a 5-star recruit and the #2 guy in the 2013 class.
There hasn’t been much written about him over the past year plus, but I’m thinking that changes this Fall. Many people like Victor Bolden, but I think Bolden is more suited as a 3rd WR/slot guy than a #1 guy on the outside. Jarmon, Mullaney, and Bolden is the best lineup. Malik Gilmore is listed #1 on the depth chart right now, but he’s not a game changer. He’s more of a large, possession WR in the Kevin Cummings mold. What makes Mullaney great, over say someone like Gilmore (who has the same size), is that the former has tremendous body control/agility. Gilmore doesn’t have any exceptional skill set. He is a fine backup but Jarmon is the better talent. Riley needs to groom Jarmon to take Cook’s role, which means he very likely will not.