0 1 4 ▁On ▁May ▁ 3 1 , ▁ 2 0 1 4 , ▁ 4 9 ers ▁signed ▁Thomas ▁to ▁a ▁four - year , ▁$ 2 . 7 2 ▁million ▁contract ▁that ▁includes ▁a ▁signing ▁bonus ▁of ▁$ 5 0 6 , 0 1 6 . ▁ ▁Thomas ▁spent ▁the ▁entire ▁ 2 0 1 4 ▁season ▁on ▁the ▁reserve / non - football ▁injury ▁list ▁due ▁to ▁the ▁A CL ▁injury ▁suffered ▁before ▁the ▁draft . ▁▁ 2 0 1 5 ▁Through out ▁training ▁camp , ▁Thomas ▁competed ▁against ▁Ian ▁Sil ber man , ▁Joe ▁Lo oney , ▁Andrew ▁T iller , ▁and ▁Jordan ▁De vey ▁for ▁the ▁job ▁as ▁the ▁starting ▁left ▁guard , ▁left ▁vac ant ▁by ▁the ▁departure ▁of ▁Mike ▁I up ati ▁to ▁the ▁Arizona ▁Card inals ▁in ▁free ▁ag ency . ▁Head ▁coach ▁Jim ▁Tom s ula ▁named ▁him ▁the ▁backup ▁right ▁guard ▁to ▁De vey ▁to ▁start ▁the ▁regular ▁season . ▁He ▁was ▁in active ▁for ▁all ▁ 1 6 ▁games ▁in ▁ 2 0 1 5 . ▁ ▁Detroit ▁L ions ▁On ▁August ▁ 2 9 , ▁ 2 0 1 6 , ▁the ▁ 4 9 ers ▁trad ed ▁Thomas ▁to ▁the ▁Detroit ▁L ions ▁in ▁exchange ▁for ▁wide ▁receiver ▁Jer emy ▁Ker ley . ▁ ▁On ▁September ▁ 3 , ▁ 2 0 1 6 , ▁he ▁was ▁wa ived ▁by ▁the ▁L ions ▁and ▁was ▁signed ▁to ▁the ▁practice ▁squad ▁the ▁next ▁day . ▁He ▁signed ▁a ▁reserve /