I would imagine that many of these guys will return for the fall of 2021. There is a good chance we don't have more than 10 FCS players drafted in 2021. There are only about 4-5 FCS players who should come on out based on where they stand right now.
Here is my updated list of FCS names to watch after all the transfers so far.
RB Billy Ray McCrary III Abilene Christian QB Aqeel Glass Alabama A&M RB Karl Mofor Albany (NY) SS Qwynnterrio Cole Alcorn State FS Juwan Taylor Alcorn State QB Felix Harper Alcorn State CB Shawn Steele Arkansas-Pine Bluff WR Harry Ballard III Arkansas-Pine Bluff RB Keshawn Williams Arkansas-Pine Bluff WR Josh Wilkes Arkansas-Pine Bluff WR DeAngelo Wilson Austin Peay State CB Kordell Jackson Austin Peay State ILB Rashon McNeil Bethune-Cookman QB EJ Perry Brown OLB Simeon Page Bucknell WR Quentin Harrison Cal Poly CB Darion Slade Campbell CB Robert Rochell Central Arkansas DE J.W. Jones Central Arkansas WR Tyshaun James Central Connecticut State OLB Tre Jones Central Connecticut State WR Bryce Nunnelly Chattanooga OG Cole Strange Chattanooga FB Chris James Chattanooga CB Brandon Dowdell Chattanooga OG Jack Badovinac Colgate QB Grant Breneman Colgate WR Phazione McClurge Cornell WR Drew Estrada Dartmouth CB Dewayne Terry Jr. Dartmouth RB Wesley Dugger Davidson SS Brandon Easterling Dayton OT David Kroll Delaware SS Will Warner Drake TE Todd Summers Duquesne CB Tyree Robinson East Tennessee State ILB Dytarious Johnson Eastern Illinois SS Raymond Crittenden Eastern Illinois CB Mark Williams Eastern Illinois DT Elijah Taylor Eastern Kentucky OT Tristen Taylor Eastern Washington QB Eric Barriere Eastern Washington DT Keith Moore Eastern Washington QB Davis Cheek Elon OT Calvin Ashley Florida A&M P Chris Faddoul Florida A&M OG Keenan Forbes Florida A&M OT Nick Zakelj Fordham ILB Glenn Cunningham Fordham K Andrew Mevis Fordham RB Devin Wynn Furman RB Chance Walker Gardner-Webb OG David Moore Grambling State SS Danquarian Fields Grambling State QB Jett Duffey Hampton WR Tenio Ayeni Holy Cross OG Brian Foley Holy Cross QB Bailey Zappe Houston Baptist ILB Caleb Johnson Houston Baptist WR Ben Ratzlaff Houston Baptist OLB Christian Elliss Idaho OLB Charles Akanno Idaho SS Tyrese Dedmon Idaho WR Tanner Conner Idaho State DT Kainoa Paaluhi-Fuiava "Fuiava" Idaho State OT Drew Himmelman Illinois State FS Christian Uphoff Illinois State OG Gabe Megginson Illinois State RB Jeff Proctor Illinois State QB Brady Davis Illinois State CB Malick Phillips Incarnate Word (TX) DE Inoke Moala Indiana State OG Isaiah Edwards Indiana State DE Kaleb Brewer Indiana State TE Trae Barry Jacksonville State QB Zerrick Cooper Jacksonville State OG Liam Fornadel James Madison DT Mike Greene James Madison SS Wayne Davis James Madison RB Jawon Hamilton James Madison CB Wesley McCormick James Madison OLB Bryson Armstrong Kennesaw State OG Liam Dobson Maine ILB Grant Dixon Marist DE Isaiah Chambers McNeese State TE Jamal Pettigrew McNeese State WR Trevor Begue McNeese State FS Jovan Grant Merrimack WR Lonnie Moore IV Monmouth (NJ) ILB Jace Lewis Montana WR Samori Toure Montana WR Samuel Akem Montana OT Conlan Beaver Montana SS Gavin Robertson Montana OT Dylan Cook Montana OT Lewis Kidd Montana State OLB Amandre Williams Montana State OG Taylor Tuiasosopo Montana State WR Wesley Wolfolk Morgan State ILB Anthony Koclanakis Murray State SS Evan Horn New Hampshire WR Dai'Jean Dixon Nicholls State OG P.J. Burkhalter Nicholls State DE De'Shaan Dixon Norfolk State DE Chris Myers Norfolk State WR Justin Smith Norfolk State RB Jah-Maine Martin North Carolina A&T CB Mac McCain III North Carolina A&T WR Zachary Leslie North Carolina A&T WR Korey Banks North Carolina A&T CB Bryan Mills North Carolina Central OLB Jaxson Turner North Dakota OT Dillon Radunz North Dakota State OT Cordell Volson North Dakota State CB Josh Hayes North Dakota State K Luis Aguilar Northern Arizona P DJ Arnson Northern Arizona OT Spencer Brown Northern Iowa DE Elerson G. Smith Northern Iowa CB Xavior Williams Northern Iowa DE Brawntae Wells Northern Iowa RB Dom Williams Northern Iowa SS Austin Evans Northern Iowa DT Tim Butcher Northern Iowa DT Jared Brinkman Northern Iowa DE Prince Emili Penn ILB Brian O'Neill Penn WR Emmanuel Daigbe Portland State P Seth Vernon Portland State FS Reggie Stubblefield Prairie View A&M CB Jaylen Harris Prairie View A&M WR Tristen Wallace Prairie View A&M WR Tony Mullins Prairie View A&M OLB Storey Jackson Prairie View A&M ILB Colby Campbell Presbyterian College (SC) OLB Jeremiah Tyler Princeton CB Delan Stallworth Princeton DE Andre Bibeault Rhode Island OLB L.B. Mack III Rhode Island ILB Tyler Dressler Richmond OT Tim Coleman Richmond CB Daron Bland Sacramento State RB Elijah Dotson Sacramento State CB Zyon McCollum Sam Houston State WR Jequez Ezzard Sam Houston State DT Joseph Wallace Sam Houston State P Matt McRobert Sam Houston State C Colby Thomas Sam Houston State OG Mike Williams Samford CB Decobie Durant South Carolina State CB Zafir Kelly South Carolina State ILB Chad Gilchrist South Carolina State ILB Jack Cochrane South Dakota P Brady Schutt South Dakota OG Mason Scheidegger South Dakota OLB Jake Matthew South Dakota C Wes Genant South Dakota State FS Michael Griffin II South Dakota State OLB Bryant Pirtle Southeast Missouri State OT Ja'Chai Baker Southeast Missouri State FS Bydarrius Knighten Southeast Missouri State DE Houston Miller Southeastern Louisiana QB Cole Kelley Southeastern Louisiana WR Austin Mitchell Southeastern Louisiana DE Anthony Knighton Southern Illinois WR Landon Lenoir Southern Illinois ILB Bryce Notree Southern Illinois RB Jay Green Jr. Southern Utah FS Alize Ward Stephen F. Austin RB Da'Leon Ward Stephen F. Austin CB Aretavious Hendrix Stephen F. Austin DT Rayshad Nichols Stephen F. Austin OLB Augie Contressa Stony Brook DT Sam Kamara Stony Brook CB T.J. Morrison Stony Brook WR J.F. Thomas Tarleton State FS Benjie Franklin Tarleton State DT Jordan Wells Tarleton State CB Devin Hafford Tarleton State DE Emmanuel Olenga Tennessee State OT Cam Durley Tennessee State OG Mike Arnold Tennessee State RB Peyton Logan Tennessee-Martin WR Donnie Corley Texas Southern WR Raleigh Webb The Citadel OLB Willie Eubanks III The Citadel OG Aaron Grzymkowski Towson WR Caleb Smith Towson DE Ron Johnson Towson DE Bryce Carter Towson OG Demarcus Gilmore Towson P Daniel Whelan UC Davis LS John Aloma UC Davis CB Jaquan Amos Villanova DE Malik Fisher Villanova ILB Forrest Rhyne Villanova QB Dan Smith Villanova CB Nowooola Awopetu Villanova OT Kofi Appiah Villanova RB Justin Covington Villanova QB Reece Udinski VMI SS A.J. Smith VMI OG Ty Whitworth Weber State DT Jared Schiess Weber State WR Rashid Shaheed Weber State FB Clay Moss Weber State C Ben Bos Weber State K Trey Tuttle Weber State ILB Ty Harris Western Carolina SS Michael Murphy Jr. Western Carolina FB Clint Ratkovich Western Illinois WR John Brunner Western Illinois WR Dennis Houston Western Illinois DE Will Kiely William & Mary ILB Joe Beckett Wofford CB Melvin Rouse II Yale TE JJ Howland Yale SS Zaire Jones Youngstown State