How did the 2016 Sleeper Alert! list pan out? Let's take a look.

Dan Altavilla reaches the major leagues with the Seattle Mariners, just over two years after being drafted.

With Carlos Ruiz traded to the Dodgers, the Phillies turn to rookie catcher Jorge Alfaro.

The 2010 first-rounder has fought injuries but finally arrives in the majors.

Bruce Maxwell was a monster in college, stopped hitting for three years, then started mashing again this season.

Signed for just $500,000, Cuban outfielder Guillermo Heredia looks like a nice bargain for the Mariners.

If you blinked, you may have missed his MLB debut but Adalberto Mejia will be back.

Rookie Robert Gsellman replaces the injured Steven Matz on the New York Mets roster.

A look at the newest member of the Orioles pitching staff: rookie Parker Bridwell

San Diego Padres rookie Patrick Kivlehan brings his power bat to the majors.