Following 14 April practices, the University of Washington football lineup, filled with veteran players with well-involved starting histories, is beginning to take shape as everyone heads into Friday night's Spring Game. Yet not everything is settled for Jedd Fisch's coaching staff. Likely four of the 22 first-unit spots, including three on offense, still have plenty of mystery surrounding them that won't get workded out until Fall Camp. Foremost, the Huskies need a No. 1 running back, somebody to carry the football about 15 times per game. Coming out of spring, the leader would be redshirt freshman Quaid Carr. However, the injured Jordan Washington (neck), who began spring ball as the starter, could be cleared to play again in August. Injured senior transfers Trey Cooley (knee) from Troy and Jayden Limar (ankle) from Oregon are on schedule to join the competition this fall, as well. The UW quarterbacks and running backs go through a spring drill.…