2015 NFL Draft underclassmen declaring or returning to school

With only a few teams left in the NFL playoffs, many clubs are now building their big boards for the 2015 NFL draft. They'll be doing so from now until closer to April, but in the meantime, they're still waiting on the decisions of several underclassmen.

Juniors and redshirt sophomores have until Jan. 15 to officially declare for the draft, which is just three days after the College Football Playoff championship game. Needless to say, there isn't much time for players to decide if they'll enter the draft or return for another season of college.

Most of the top prospects who are underclassmen have declared, including USC DE Leonard Williams, Florida State QB Jameis Winston, Missouri DE Shane Ray and Alabama WR Amari Cooper. Here's a list of everyone who's declared up to this point:

Nelson Agholor, WR, Southern California 
Jay Ajayi, RB, Boise State 
Javorius Allen, RB, Southern California 
Kwon Alexander, LB, LSU 
Deion Barnes, DE, Penn State 
Malcom Brown, DT, Texas 
Dorial Green-Beckham, WR, Oklahoma 
Alex Carter, CB, Stanford 
Sammie Coates, WR, Auburn 
Tevin Coleman, RB, Indiana 
Jalen Collins, CB, LSU 
Amari Cooper, WR, Alabama 
Xavier Cooper, DE, Washington State 
Christian Covington, DT, Rice 
Mike Davis, RB, South Carolina 
Stefon Diggs, WR, Maryland 
Lorenzo Doss, CB, Tulane 
Lemar Durant, WR, Simon Fraser 
Mario Edwards, DE, Florida State 
Durell Eskridge, S, Syracuse 
Ereck Flowers, OT, Miami 
Dante Fowler, DE/OLB, Florida 
Devin Funchess, WR/TE, Michigan 
Charles Gaines, CB, Louisville
Melvin Gordon, RB, Wisconsin 
Deontay Greenberry, WR, Houston 
Randy Gregory, DE/OLB, Nebraska 
Todd Gurley, RB, Georgia 
Chris Hackett, S, TCU 
Eli Harold, DE/OLB, Virginia 
Chris Harper, WR, California 
Dee Hart, RB, Colorado State 
Gerod Holliman, S, Louisville 
D.J. Humphries, OT, Florida 
Brett Hundley, QB, UCLA 
Danielle Hunter, DE, LSU 
Jesse James, TE, Penn State 
Duke Johnson, RB, Miami 
Matt Jones, RB, Florida 
Nigel King, WR, Kansas 
Tyler Kroft, TE, Rutgers 
Benardrick McKinney, ILB, Mississippi State 
Tyler Moore, G, Florida 
Rakeem Nunez-Roches, DT, Southern Miss 
Andrus Peat, OT, Stanford 
Marcus Peters, CB, Washington 
Jordan Phillips, DT, Oklahoma 
Bradley Pinion, P, Clemson 
Jeremiah Poutasi, OT, Utah 
Shane Ray, DE/OLB, Missouri 
Josh Robinson, RB, Mississippi State 
Shaq Roland, WR, South Carolina 
James Sample, S, Louisville 
Jean Sifrin, TE, Massachusetts 
Donovan Smith, OT, Penn State 
Noah Spence, DE/OLB, Ohio State 
Jaelen Strong, WR, Arizona State 
Shaq Thompson, OLB, Washington 
Max Valles, OLB, Virginia 
Trae Waynes, CB, Michigan State 
Leonard Williams, DT, Southern California 
Maxx Williams, TE, Minnesota 
P.J. Williams, CB, Florida State 
Trey Williams, RB, Texas A&M 
Jameis Winston, QB, Florida State 
T.J. Yeldon, RB, Alabama

Notable players who've announced they're returning to school:

James Burgess, ILB, Louisville 
Shilique Calhoun, DE, Michigan State
Leonte Carroo, WR, Rutgers 
Connor Cook, QB, Michigan State 
Sheldon Day, DT, Notre Dame 
Taylor Decker, OT, Ohio State 
Spencer Drango, OT, Baylor 
Travin Dural, WR, LSU 
Leonard Floyd, OLB, Georgia 
D.J. Foster, RB/WR, Arizona State 
Jordan Jenkins, OLB, Georgia 
Cardale Jones, QB, Ohio State 
Karl Joseph, S, West Virginia 
Cody Kessler, QB, Southern California 
Nick Martin, G, Notre Dame 
Malcolm Mitchell, WR, Georgia 
Antonio Morrison, LB, Florida 
Dadi Nicolas, DE, Virginia Tech 
Shawn Oakman, DE, Baylor 
Eric Striker, OLB, Oklahoma 
Charles Tapper, DE, Oklahoma 
John Theus, OT, Georgia 
Duke Williams, WR, Auburn 
Jonathan Williams, RB, Arkansas