Servais told his club that if it scored at least 10 runs and won Sunday against the Oakland Athletics, he would wear the jewels. The Mariners beat the Athletics 11-1 at O.co Coliseum in Oakland.
On the team's flight to Detroit, Servais sported a black jumpsuit, sunglasses, a huge watch, and three chains. He also posed like a rapper from the 1990's.
"I just thought it was a very professional approach by our guys today," Servais told the team website. We needed some big hits and we got them. Our at-bats were really good all day."
The Mariners also scored 10 runs in an April 19 10-5 win against the Miami Marlins. Servais' squad has 90 runs this season, good for third in the American League.
Seattle [8-12] battles the Detroit Tigers at 7:10 p.m. EDT Tuesday at Comerica Park in Detroit.