MLB Network will air the reality series "The Pen" starting June 14.

The series, which follows the Philadelphia Phillies bullpen, will air for six weeks. It will feature on-the-field and off-the-field interviews, as well as coverage from 2009 Spring Training to the All-Star break.

Phillies relief pitcher and MLB Network analyst Mitch Williams will narrate the series.

"The Pen" is a co-production of MLB Network and MLB Productions.

"As a reality-based series, ‘The Pen’ is the ultimate look into the lives of these players, both on and off the field," said Tony Petitti, president and CEO of MLB Network. "So much of what we know about relief pitchers is based on statistics and saves, and a series like ‘The Pen’ gives a level of familiarity to each player."

–Vlada Gelman