L.B.
Hmm. Has he been watching a lot of t.v. lately? T.v. does both of these things: makes kids want more stuff (they see it all the time in the commercials), and makes them bored with everything (they don't know how to get and remain actively involved in things because t.v. does all of the entertaining for them; it's easy. It's also very flashy compared with real life, and seems almost designed to create short attention spans).
Reducing screen time (not just for him, but the whole family) will probably resolve this behavior. It will also resolve the family time issue - even if you did baseball practice with him, maybe he's wanting more time with you guys, in general. (Which is great!)
For more information on the effects of t.v., video games, etc., read The Plug-in Drug by Marie Winn. Amazing book.
L.