Darren Krein enters his second season with the Dolphins after being named the head strength and conditioning coach on January 20, 2011. He was retained by Head Coach Joe Philbin on January 30, 2012.

Prior to his arrival in Miami, Krein spent 11 years in the NFL in various strength and conditioning capacities, having been a part of the Seattle Seahawks staff on two different occasions (1997-98 and 2001-09). He originally joined the Seahawks as a member of Dennis Erickson’s staff on March 1, 1997, for two seasons and re-joined the team in 2001 in the same capacity under Mike Holmgren. Krein holds the distinction of being the first-ever assistant strength and conditioning coach hired by the Seattle Seahawks.

While in Seattle he assisted in the coordination of the players’ weight training, along with the team’s offseason conditioning program. He also played an integral role in the designing and implementation of the rehabilitation process, working with players that were previously injured to help build strength and flexibility to become game ready. A notable Krein achievement was the physical development of Pro Bowl quarterback Matt Hasselbeck, who after injuries cut short his first season in Seattle (2001) and serving as the primary backup in 2002, Hasselbeck’s offseason training, under the supervision of Krein, allowed him in 2003, 2005 and 2007 to become the first Seahawks quarterback since Rick Mirer in 1993 to start all 16 games as well as being named a member of the NFC Pro Bowl squad.

Prior to joining the Seahawks, Krein was a 1994 fifth-round (150th overall) draft choice of the San Diego Chargers. He missed his rookie season due to a knee injury. Claimed off waivers by the Green Bay Packers on June 17, 1995, he did not see game action. Krein played the 1996 World League season with the Barcelona Dragons, but re-injured his knee and retired.

A four-year letterman as a defensive end at the University of Miami (1989-93), Krein was a unanimous first-team All-Big East selection as a senior and left the Hurricanes with 190 career tackles and 17.5 sacks after beginning his career as a middle linebacker. Krein earned his degree in business management from the University of Miami.

A native of Aurora, Colorado, where he attended Smoky Hill High School, Krein and his wife, Jennifer, have a daughter Ella and two sons Aiden and Kellen.