Almost took both the remaining cards with this guess - the last card is a "P" but not P3!
You got it Katester, the card is 1989 UD #44 Jim Eisenreich!
Fun Eisenreich fact: Eisenreich was the runner on 2nd when Edgar Renteria hit his bottom of the 11th walkoff single to win game 7 of the 1997 World Series for the Florida Marlins
Maybe a bit less fun, but I found this really interesting:
the story of how Eisenreich's lifelong struggle with Tourette syndrome almost cost him his baseball career (and, incidentally, made space for Kirby Puckett's MLB debut in 1984 - fitting that this card would go to a Puck collector!)
If you guessed after Katester, go again!