ALLEN PARK -- Detroit Lions rookie quarterback Kellen Moore is the most notable undrafted free agent signed after this year's NFL Draft, but several other college players are now under contract.

In addition to the 13 undrafted players previously reported on MLive.com, there are seven other players who have been signed since the draft, according to sources.

Here are the names of those players:

Wayne State - Troy Burrell, WR

Old Dominion - Edmon McClam, DE

Temple - Pat Boyle, G

Penn State - Stephfon Greene, RB

Northern Iowa - Austin Wells, TE

Mississippi Gulf Coast Community College - Alonzo Lawrence, CB

Idaho - Michael Cosgrove, DT

Below is the previously reported list of players:

Williams & Mary -- TE Alex Gottlieb

Illinois - K Derek Dimke

Boise State - QB Kellen Moore

Houston - WR Patrick Edwards

Elon - G Rodney Austin

New Mexico - LB Carmen Messina

Kentucky - ILB Ronnie Sneed

Penn State - OL Quinn Barham

Washington State - WR Jared Karstetter

Idaho - DT Michael Cosgrove

Jacksonville State - DE Monte Lewis

Weber State -- OL J.C. Oram

Oklahoma -- S Sam Proctor

The Lions will also invite several undrafted players to tryout during next week's rookie mini-camp. Detroit's camp will be held May 11-13 at its Allen Park facility.

Here is a short highlight of Greene: