Buck Showalter and his Baltimore Orioles celebrated an American League East championship after beating visiting Toronto 8-2 on Tuesday night. It’s the first division crown for the O’s since 1997. Former Mississippi State standout Showalter will make his fourth foray into the postseason as an MLB skipper looking for another elusive achievement. For all his success (.521 winning percentage) in various places, Showalter has yet to win a postseason series. … In Atlanta, former MSU star Tyler Moore and Ole Miss product Aaron Barrett got to celebrate as Washington clinched the National League East with a 3-0 win over the Braves. … In the role of spoiler, Meridian Community College alumnus Corey Dickerson went 2-for-4 with a home run and four RBIs to lead Colorado to a 10-4 win over the Los Angeles Dodgers, whose NL West lead over San Francisco slipped to 3 games. Dickerson is batting .307 (he’d be in the top five in the batting race if he had enough plate appearances) with 23 bombs, 73 RBIs, 70 runs, 27 doubles, five triples and eight stolen bases. … Former Mississippi Braves star Charlie Morton, making his first start in a month because of injury issues, threw five shutout innings for Pittsburgh, which beat Boston 4-0 and boosted its postseason hopes. Morton is 6-12 with a 3.72 ERA for former Jackson Mets manager Clint Hurdle’s Bucs, who are just 2 1/2 games back of St. Louis in the NL Central. … Wasting a great start (one run in seven innings) by ex-Ole Miss standout Lance Lynn, the Cardinals lost to Milwaukee 3-2 in extra innings. … M-Braves alumnus Craig Kimbrel is Atlanta’s nominee for the Roberto Clemente Award, ex-M-Brave Todd Redmond is Toronto’s and Morton is Pittsburgh’s.