Thoughts on Del Rio changing his mind about Leftwich

About a week ago I talked about how Garrad should start over Leftwich, and the next day Leftwich was named the opening day starter, but it wasn't for long, a few days later Jags HC Jack Del Rio named Garrard the starter, and said they were going to release Leftwich. I was wandering what sparked him to bench Leftwich after naming him the starter a few days before. I agree with the decision, but you can't just change your mind just like that. Do you think it was fair for Leftwich?