Mark Grant was a first-round pick by the San Francisco Giants in the 1981 Major League Baseball Draft.

Grant started his major league career with the Giants from 1984 through 1987, when he was traded to the San Diego Padres.

 

Grant played for the Padres through 1990 where he was again dealt to the Atlanta Braves for Derek Lilliquist.

 

In the 1992 off-season, he signed with the Seattle Mariners to a one-year deal.

 

In 1993, he signed to the Houston Astros. The same season on May 20, he was sent to the expansion team Colorado Rockies for Braulio Castillo.

 

He was released from the club just two months later, and signed with the California Angels on August 20.

 

In 1994, he took a break from baseball to host a talk radio show for KFMB-AM along with broadcasting Padres games for the station.

 

Grant returned to baseball in 1995 when he pitched for the Chicago Cubs AAA affiliate Iowa.

 

In 1996 he briefly played for CPBL's Uni-President Lions and officially retired from baseball after leaving the Lions.