Gordon had a point, that was a gift.
This sounds like an unsubstantiated baseballism. Any time you like a pitcher (ie someone pitching for the Yankees) you say "he's keeping the ball down", and any time you don't like a pitcher (anyone pitching for the Sox) you say "he's not keeping the ball down".
It doesn't pass the smell test. He's using the whole strikezone, like any good pitcher should. Quality strikes aren't exclusive to the lower part of the zone. Up and in is quite a good location because it's tough to handle.
Here's his location by pitch type.....
http://brooksbaseball.net/pfx/location.php?xml=http://gd2.mlb.com/components/game/mlb/year_2009/month_04/day_11/gid_2009_04_11_nyamlb_kcamlb_1//pbp/pitchers/282332.xml&batterX=0&innings=yyyyyyyyy&sp_type=1&s_type=2
Can we let this baseballism die, please? Or at least, only apply it do pitchers that it makes a difference for, like sinkerballers and knuckleballers.