Are the Seattle Mariners poised to level up this season? Perhaps, if a jersey patch is the boost the team needs. The Mariners ...

The Seattle Mariners announced today that Nintendo of America Inc. has expanded upon their long-standing relationship with the club, becoming the team’s first-ever official jersey sleeve partner.

Nintendo, which has a 10 percent ownership stake in the Mariners, will be the team's first-ever jersey sleeve partner.