I don't know much about Rosario since I don't get to watch many games. A #2 hitter should be good at hitting behind runners and be a good contact hitter if you want to play a hit and run if they aren't a classic #2 who might be a good bunter to move a runner.

Hitting behind runners is a lost art. If he can do that you can move the fast guy to 3rd. It is also a bit harder for the 2nd baseman to start a DP and the SS to turn the DP.

Just throwing out some thoughts.