The Mariners will retire Ken Griffey, Jr.’s number in August

AP Photo/Kathy Willens

Hall of Famer Ken Griffey, Jr. will have his number retired by the Mariners in August,’s Greg Johns reports. He’ll become the first Mariner to have his number retired by the club.

The Mariners are designating August 5-7 — a home series against the Angels — as Ken Griffey, Jr. weekend. Griffey will also throw out the first pitch before the Mariners’ home opener on April 8 against the Athletics, Johns notes.

Griffey and Piazza learned on Wednesday they were the two inductees into the Hall of Fame. Griffey received votes on 99.3 percent of ballots, surpassing Tom Seaver’s previous high water mark of 98.84 percent. Piazza received 83 percent of the vote.