Major League Baseball released the 2010 master schedule today. Time to plan next summer (and lobby your engaged friends about when NOT to take the plunge.) Here are a few dates worth noting on the Mariners 2010 schedule.

April 5: First regular season game @ Oakland.

April 12: Opening day at Safeco vs. Oakland.

May 7-9: First series vs. (presumed) defending AL West champ Angels. It’s at Safeco.

May 21-23: First interleague series vs. (YAWN) San Diego. It’s at Safeco.

June 15-17: Mariners @ St. Louis (Haven’t played St. Louis since ’04).

June 22-24: M’s host Cubs at Safeco. (Cubs haven’t visited since ’02).

July 8-11: Four-game series vs. Yankees at Safeco. (The Yanks only trip to Seattle).

July 13: 81st All-Star Game, in Anaheim.

July 22-25: Four-game series vs. Red Sox at Safeco.

July 31: M’s first game at new Minnesota Twins stadium.

August 13-25: Monstrous East Coast road trip, 12 games in 13 days vs. CLE, BAL, NYY and BOS.

Sept. 13-15: Red Sox visit again. (Possible pennant race implications?)

Sept. 30-Oct. 3: Four-game series vs. Oakland at Safeco closes regular season.