Thanks guys! We have 14 in now, so I debated between a 16 or 24 team league and decided to go with the latter. Anyway, the league number is MLB120829, and I chose 1913 Jim Scott as my loser. Please feel free to enter your teams as soon as you're ready.
BTW, fatboydad's selection prompted me to add another rule clarification, which is if your chosen pitcher's 20 losses were spread between more than one team, you are limited to filling your roster from your choice of only one of those teams.