The Miami Marlins starters, in order comprised of José Ureña, Trevor Richards, Pablo López, Sandy Alcántara, and Caleb Smith, have now started twice each. How do they stack up against one another on these pretty small sample sizes. We’ll start with who’s doing the best. The first metric, Wins Probability Added, measures success and failure relative to game situation, and measures a player’s effectiveness at impacting the outcome of a game. The second metric, GameScore, is closely tied to getting deep into the game, strikeouts over walks, and keeping the opponent off the board.