I mean, he could. Knowing JK I wouldn't be half surprised if Sacha suited up at LB, lol. It's tough to predict what our XI will be against Antigua honestly. He could some really weird stuff.
Thankfully, Antigua is awful. And from what I've seen Guatemala is completely decimated at CB and is playing some guys who should be downright awful as well.
There's always this guy for that LB hole: