I think the option is a huge difference, and his power numbers are inconsequential since it's a backup role, and he really only backs up two guys, Swihart also has no topions, but is being tried at 4 or 5 different positions. Swihart's limited success in some small stints in MLB probably also helps his case. But I think the versatility is a bigger deal.
As fornot caring that Brentz sucess came in in AAA, that's only part of the issue,and a very small part. He also did not have them until his sixth season in AAA at age 28. THAT is a bigger deal and speaks to his ability to adjust. I know he missed parts of a season here and there, but let's be realistic. We are traling about SIX YEARS to adjust to MiLB pitching. How many will it take to adjust to MLB pitching? If you want to use his injuries as an excuse for adjusting to AAA pitching, can you promise me he won't get injured in the majors?