Spring cleaning: TCU hopes to solidify revamped offensive line

TCU football begins spring practice on Friday.

As usual, depth chart battles and fights for starting roles begin now.

The Horned Frog return 11 starters, including six on defense. The offense, with five retuning starters, will be turned over to quarterback Shawn Robinson. Linebacker Ty Summers returns for his senior season with a chance to become all-time leading tackler under Gary Patterson.

Here are five things to watch as spring kicks off:

1. Offensive line

The Frogs have to replace four starters on their offensive line, including left tackle Joseph Noteboom, right guard Matt Pryor and guard/center Austin Schlottmann. That trio combined for 101 starts. Guard Cordel Iwuagwu started 14 games in 2017 and right tackle Lucas Niang started eight games. Austin Meyers enters camp at left tackle and Kelton Hollins will be at center. Junior Trey Elliott provides depth at the guard positions.

2. Shawn Robinson

Robinson was the Frogs' most-heralded commit a year ago. He played in six games as a true freshman behind Kenny Hill. He threw for 184 yards and three touchdowns (with no interceptions) but completed 48 percent of his passes. He has the arm, but his accuracy needs work. Robinson can run, as he showed with 84 yards rushing against Texas Tech.

3. Backup Quarterback

Penn transfer Michael Collins chose TCU over Iowa, Nebraska and Pittsburgh last spring. Collins (6-foot-5, 210 pounds) saw limited action in three games for Penn as a freshman. He'll battle Grayson Muehlstein for the backup role behind Robinson. Collins was a teammate of Frogs' offensive tackle Lucas Niang at New Canaan (Conn.) High School.

4. The Early Enrollees

TCU has four early enrollees taking part in spring practice. Quarterback Justin Rogers, the highest-rated recruit in school history, may not see any action while recovering from knee ligament surgery. He injured his knee in his senior season opener at Bossier City (La.) Parkway in August. It seems like a good bet that Rogers will be redshirted his freshman season. Wide receiver Taye Barber, tight end Pro Wells and offensive tackle Anthony McKinney are the others who have enrolled early.

5. The Manning

Receiver Omar Manning missed his freshman season after an injury during August camp. Manning was a four-star recruit (rated the 24th receiver by 247Sports) out of Lancaster. He and Jalen Reagor, another four-start receiver in last year's class from Waxahachie, could be a dynamic duo of weapons for Robinson.