• While the Mariners have topped the A's in three straight Opening Day games going into Monday's game, Seattle hasn't won the season series against Oakland since 2009 when it went 14-5. Last year the Mariners were 7-12 against the AL West champion A's after losing the last seven games.
• Felix Hernandez became the third Major League pitcher since 1920 to record his sixth Opening Day start before the age of 27 on Monday, joining Bert Blyleven and Dwight Gooden. Hernandez turns 27 next Monday. He's one of 10 active pitchers with at least six Opening Day starts.
• Blake Beavan pitched five innings in a Minor League intrasquad game in Peoria, Ariz., on Sunday, allowing four hits and two runs with no walks and five strikeouts in 74 pitches. That outing keeps him on line to make his debut Friday when the Mariners open a series against the White Sox in Chicago.
• Monday marked Raul Ibanez's 15th Opening Day. Ibanez is the oldest member of the Mariners roster at 40, while reliever Carter Capps -- who turned 22 on Aug. 23 -- is the youngest player on the squad.
Greg Johns is a reporter for MLB.com. Follow him on Twitter @GregJohnsMLB as well as his Mariners Musings blog. This story was not subject to the approval of Major League Baseball or its clubs.