It looks like Mike Harris, a red shirt sophmore who lost out to Hasiak for the starting spot during Fall camp is getting another shot to prove himself. Hasiak is sitting out couple of days with a "stinger" in his shoulder which put Harris back in the first team. From the LA Times:
The temporary change was a chance to look at options in case of more injuries. It was also an indication that Harris was on the short list for substantial playing time.
"I think he has really worked hard during the off-season," offensive line coach Bob Palcic said. "He's stronger, more confident. He understands the system."
Harris was at a disadvantage when training camp started. He missed spring practice with a broken bone in his right foot. A new batch of linemen came in, including Hasiak and fellow freshman Xavier Su'a-Filo.
"I knew they were going to give all those guys a shot," Harris said. "They're a bunch of good guys. X and Stan are two good freshmen. If not this year, then in years to come they will help this team get back to where we want to be."
Harris, a redshirt sophomore, wants to be a part of that as well.
"I knew I had a lot to make up because I missed spring," Harris said. "Every chance I took mental reps, stayed after practice to get in work. I knew it was going to take a lot of effort and a lot of hard work to get back in the rotation."
The shift means Baca per the the Times report is "getting a referesher couse at guard." Hopefully Hasiak is back in full health in couple of days but it sounds like Palcic has confidence in Harris.
Also, please note I am almost 99 percent sure Hasiak is not the one contemplating about taking a mission. It's XSF who might be thinking about taking a mission after his first year since it was an issue during his recruiting. This confusion is a result of mistake in LAT's report from the first day in the training camp, which mixed up the two freshmen OL.