As Mike watches the Isotopes' baseball game at home, viewers hear the play by play coming from the TV. The announcer mispronounces umpire Todd Tichenor's last name. Tichenor's name is pronounced with a short I, not a long I.
The baseball game Mike watches at his house is from April 2004. The scene is set in 2003.
When "Gene" gets out of the cab from the hospital in Omaha, he walks down the street past the house that was used as the location for Jesse Pinkman's parents' house, which would obviously be in Albuquerque.
In the Madrigal warehouse, Mike confronts Ramirez about the lack of lift belts. He is clearly wearing the stolen badge with the name of B. Hedberg. Since Ramirez is a "team leader", he's obviously an employee with some tenure and would certainly know who the floor supervisor is. There is little to no chance that Mike would get away with his impersonation.