Bimage and Harrison are back.
Young might be leaving but yet unconfirmed.
Tyler, Moore, Schooler, Green, Watson, Vaughns, Carson, JQJ, Alford and Ingram have all left.
Derrian Brown was still on the team but I am not sure of the technical status for him.
QB(3): Thompson (2018) - 4, Card (2020), C. Wright (2021)
RB(5) : 2017 - ???D. Young (2017)(rumors he is leaving), Johnson (2019), Brown (2019), Robinson (2020), Brooks (2021)
WR(14) : Estell (2017), Moore (2018), Woodard (2018), Smith (2019), Washington (2019), Whittington (2019), Lewis (2019), Money (2019), Omeire (2020), Dixon (2020), Harrison(2020), Alexis(2021), Cain (2021), Lee (2021)
TE(6): Brewer (2017), Epps (2018), Wiley (2019), Liebrock (2019), Davis(2021), Helm (2021)
OT(5) : Kerstetter (2017), Jones (2018), Garth (2020), Karic (2020), Merrill (2021)
OG(7) : Okafor (2016), Imade (2016), Angilau (2018), Johnson (2019), Hookfin (2019), Parr (2020), Conner (2021)
C(2): Ghirmai (2018), Majors (2020)
DE(6): Bimage (2017), Jones (2019), Mpagi (2019), Broughton (2020), Sanders (2021), Sorrell (2021)
DT(7): Coburn (2018), Ojomo (2018), Sweat (2019), Collins (2020), Goram-Welch (2020), Thomas (2021), Murphy (2021)
OLB(5) : Thornton (2016), Leitao (2017), Bush (2019), Dorbah (2020), Harris (2021)
MLB(4) : Brockermeyer (2018), Mitchell (2019), Gbenda (2019), Blackwell (2021)
WLB(5): Overshown (2018), Tillman (2019), Ford (2020), Hullbay (2020), Cooks (2021)
CB(8) : Thompson (2017), Jamison (2018), Caldwell (2019), Crawford (2020), Barron (2020), Dunn (2021), Johnson (2021), ??Ibraheem (2021)(seems likely)
NB(2): Cook (2018), Adimora (2019)
S(4) : Foster (2018), Owens (2019), Thompson (2020), Coffey (2021)
ST(4): Bujcevski (2018), Dicker (2018), Mader (2018), Pearson (2021)