Tell me about it, he made 3 errors for me in a game last night in left field by the 3rd inning and I benched him. It wasn't his slowness, he just literally kept having the ball bounce off his glove on easy fly balls. He's already got a terrible fielding rating, and apparently playing them at a secondary position (LF instead of RF) makes their fielding ratings 20% worse, so I was kinda playing with fire I guess. I'll probably end up selling him, as I haven't really had much luck hitting with him either.
Well for me, I've had like 3,000+ AB's as a lefty in RTTS and I got so used to mashing righties as a lefty, I will probably always hit better as a lefty against a righty just because of the way I see the ball (I'm a lefty in real life as well). But from a pure ratings standpoint, a righty who can hit righties really well shouldn't be any worse than a lefty who can hit righties really well.