Nebraska is loaded with guys competing at cornerback, but one veteran who won't be involved this spring is Andrew Green.
The senior from San Antonio is coming off surgery — coach Bo Pelini did not specify what kind — and will be out for the remainder of spring.
Green is one of the few defenders returning with starting experience. In Saturday's first spring practice, Stanley Jean-Baptiste and Josh Mitchell ran with the first team at corner, with Ciante Evans at nickel.
The battle for those cornerback jobs is considered wide-open with at least seven candidates.
* SANTOS IN THE MIDDLE: Sophomore David Santos got a chance to be the quarterback of the defense Saturday, working as the MIKE linebacker with the first team. Zaire Anderson (WILL) and Thomas Brown (BUCK) also got a crack with the top group.
Santos made some plays, but at one point got a pep talk from the veteran Evans to be louder in his calls.
"I had to get on him today because he made a check and said it so low that me and Josh on the other side couldn't hear him," Evans said.
* NUMBER SWITCH: Anderson has switched from No. 8 to No. 13. There is still a No. 8 on defense, though. It now belongs to freshman safety D.J. Singleton.
* NEW FACES: Sam Hahn, an offensive lineman transfer from North Dakota State, was among the newbies to the Husker roster. A redshirt freshman, the 6-foot-6, 296-pound Hahn played his high school ball at Tri County High School.
Also now on the roster is Dennis Stille. The walk-on from Ashland is listed as a defensive lineman but was working as a tight end Saturday.