The Call-Up

The Call-Up: Travis d’Arnaud

The arrivalof John Buck's baby boy precipitates the arrival of baseball's best catching prospect.

With David Freese slumping, the Cardinals dig into their deep farm system and bring up a second baseman who raced up the minor-league ladder.

Reeling from injuries and falling behind in the standings, the Diamondbacks turn to a powerful third-base prospect for help.

The Mets call up a player you've been hearing about for years.

Is the newest member of the Rockies' rotation worth a mixed-league look?

The Marlins sparkle up their season with two big call-ups.

Another piece of the Astros' future arrives.

The Indians try another rookie in the rotation.

The A's call up young pitching prospect Sonny Gray.

In search of more bang from second base, the A's call up a former first-rounder.

With Mike Pelfrey injured, the Twins bolster their rotation with a former first-rounder.

The Mariners look to Triple-A for some offensive help in the infield.

With Alfredo Figaro on the DL, the Brewers bring up a 6-foot-9 flamethrower.

After gaining polish over 13 Triple-A starts, Zack Wheeler is ready to prove that he belongs in the Mets rotation.

One of baseball's best-hitting teams adds one of baseball's best-hitting prospects.

Seattle summons another highly touted catching prospect and hopes this one doesn't disappoint.