I'm not sure there's a way to view your opponent's speed ratings. I don't think it's that crucial a stat, but you could look up the players in the draft center if you really wanted to know.
As for fielding, click on GM'S OFFICE, then TRADES, then select the team you want to "trade" with. Then click on the little red and blue arrow thingy, then SHOW FIELDING RATINGS. (You can only do this if you're in a league that allows trades, and only prior to the trade deadline.)