What's a Little Cockfighting between MLB Players?

What do pitchers Pedro Martinez and Juan Marichal have in common?

• Both are/were starting pitchers.
• Both are from the Dominican Republic
• Both are considered among the best Latino pitchers of all time
• Both led the MLB in ERA: Marichal 2.10 - 1969; Martinez - 1999, 2000, 2002-3
• Both led their league in wins: Marichal 24 - 1968; Martinez 23 - 1999
• Both have 2,000 strikeouts: Marichal 2,303; Martinez 3,030
• Both have 200 wins: Marichal 243; Martinez 209
• Both are likely Hall of Famers (Marichal’s already in the HoF)
• Both fight roosters in their native Dominican Republic