Updated: 06/14/2014 6:33 PM
Created: 06/14/2014 6:30 PM KSTP.com
By: Megan Stewart
Former Minnesota State, Mankato football player Isaac Kolstad stood for the first time since being beaten last month.
This was the first time he put weight on his legs in four weeks, Kolstad's brother-in-law, Mike Fleming, detailed on the critically injured former linebacker's CaringBridge website.
Kolstad also had a flap of his bone replaced in his skull Friday morning at the Mayo Clinic Health System.
Fleming said physical therapists this week had him standing three times and sitting on the edge of the bed - both with assistance. He also worked on holding up his head and torso.
The movements aren't the only ones Kolstad is making toward recovery.
During a FaceTime session with his wife a week ago, Kolstad gripped an iPhone so tightly it took two people to pry it from him, Flemming wrote.
"He tracked his eyes and looked at her while she talked, then he reached up and grabbed the phone and pulled it in," Flemming wrote on Kolstad's CaringBridge site. "It took two people to get his grip off when Molly had to say good night."
Kolstad's wife had given birth to the couple's second daughter two days earlier at the same hospital.
Former University of Minnesota quarterback Philip Nelson of Mankato and Trevor Shelly of St. Peter are charged in the May 11 assault in downtown Mankato.
The Associated Press contributed to this report.