Possible Clues:

• One way to get to second base
• Runner left out of team? On the contrary
• Ride a sled downhill
• Goo Goo Dolls "I'll do anything you ever dreamed to be complete" song
• Base runner's option
• Hit the dirt at third
• Third base coach's urging, maybe
• Get under the tag, hopefully
• -
• Wall Street decline, or something that might be associated with 18-, 26-, 44- or 57-Across