Dominican outfielder Gabriel Guerrero, the 17-year-old nephew of Vladimir Guerrero, has signed with the Mariners for $400,000.

Guerrero, a big-bodied 6-foot-2, 180-pound righthanded hitter, has shown good raw power and has made improvements at the plate and in the field since he became eligible to sign last year on July 2. He projects as a corner outfielder with a solid arm.