The Houston native and the team have a mutual option for 2013. Snyder was hitting just .176 with seven homers and 24 RBIs entering Monday, but his presence as a leader on a young team can't be measured with stats.
"Snyder's really provided an important element of leadership in the clubhouse," general manager Jeff Luhnow said. "Offensively, he hasn't produced the way he would have wanted or we would have wanted, but we're going to have to look forward and see what it means for us.
"Castro has emerged for us offensively, and I think he still has a few things to work on from a catching perspective, but he's going to be out No. 1 guy next year so we just need to figure out if Snyder or someone else is the best fit for that two spot."