I doubt it has anything to do with being self conscious of his image. If it is injury related and won't go on the DL, it's probably because all signs are that it's not a big enough injury to land him on the DL. Was it Rolen that spent a season hitting like crap with a shoulder problem that wasn't bad enough to land him on the DL? What is 'bad enough' to go on the DL, though? If you can take 15 days off and feel a lot better rather than consistently struggling and needing a lot off days, then there's a choice to be made. Whether the choice is made by Aramis, Piniella, Hendry or all of the above is what we don't know, but players have gone on the DL in similar circumstances before. If you have a seperated shoulder, a doctor tells you, and you go on the DL. If your shoulder seems fine, but something is off after the healing process (something like scar tissue), you may have no idea other than the poor results.