You simply cannot use the "until last year" phrase when talking about a 39 year old baseball player. He's coming in as another veteran for Dusty to overuse. The likelihood of him using Jones/Grissom in a proper platoon is extremely low since Dusty has shown little ability to properly platoon players, wait through the slump of an inexperienced player, limit the playing time of unproductive veterans, and properly read splits. You absolutely can when the sample size was nearly 1/4 of a normal major league season. Perhaps it was so small because he's so old and so bad that like his game, his body was falling apart and even the Giants couldn't justify using him more. If you're talking about a 32 or 33 year old, you're making some sense (although trusting Dusty to do it right is a stretch), but when you're talking about a 39 year old, and you're just assuming the previous disaster year was a fluke and that he'll be just fine next season, well, you're glossing over the harsh realities and just trying to paint the prettiest picture you can.