I used to have the same exact problem(s). I play with the Bears, yes the Bears.
I usually use 4-3, and rush in with the OLB. On 3rd, I pick a Nickel play and still rush in w/the OLB. When the QB passes, switch to the DB, and block the pass, it\'s tough, and you have to time it *really well* ... If not the ball will pass you, and chances are the WR will be left with a TD. If you see your DB is not close to the receiver when the pass is almost there, it\'s *very* risky to jump, most likely you\'ll miss and leave the WR alone for some good yardage. In that case, just let him catch it, then nail him.
Trust me, @ first I thought covering the pass was impossible, but eventually you\'ll get better. I had like 17 INTs one season with the Bears. (Da Bears! of all teams)
- dm