Already having nine commits in your son's class provides an indication of where he stands. It doesn't matter they haven't offered any first or third baseman. Schools select baseball talent/athletes who can be moved around to different positions. They may have made offers to five shortstops they believe can be moved to any position. Corner infielders have to be mashers to be recruited. Or a shortstop pushed to the corner on their travel team by a superior talent.
It's not time to give up. Your son could improve past some of the commits in the next two, three years. But given the number of commits at this point it's time to have your eyes open. It's one thing to get an offer. It's another to have a legit shot at getting on the field.