Three members of the Mississippi Braves’ original opening day roster from 2005 are on MLB postseason teams this year. Catcher Brian McCann, the first M-Brave to get the big league ticket, is with Houston – along with fellow ex-M-Braves Charlie Morton, Evan Gattis and James Hoyt – heading into the American League Division Series battle with Boston. Right-hander Blaine Boyer, who was the second M-Brave to be promoted to Atlanta, works out of the Red Sox’s bullpen, as does Craig Kimbrel. Outfielder Gregor Blanco, who waited a little longer – until 2008 – than McCann and Boyer to make The Show, is a bench player for Arizona, which hosts Colorado in tonight’s National League wild card game. Blanco has had a journeyman career but has played in 37 postseason games and won two World Series rings – with San Francisco in 2012 and ’14. Released by the Giants after last season, Blanco signed with the Diamondbacks. In 90 games, the speedy left-handed hitter batted .246 with three homers, 13 RBIs, 43 runs and 15 steals. He is also a good defensive outfielder. His advice for his D-backs teammates, many of whom are making their first postseason appearance? “Have fun and play the game,” Blanco told sfgate.com. “Whatever happens, happens.” P.S. Several other former Jackson area Double-A connections are with teams who made the postseason, including ex-Jackson Mets shortstop Ron Gardenhire, now Arizona’s bench coach, and ex-JaxMets infielder Dave Magadan, the D’backs’ hitting coach. Former JaxMets pitcher Neil Allen is the pitching coach for Minnesota, which was eliminated Tuesday by the New York Yankees. M-Braves alum Chasen Shreve, a Las Vegas native who threw out the ceremonial first pitch at Yankee Stadium, is a reliever for the Yanks. Dave Hudgens, a onetime Jackson Generals hitting coach, now fills that role for Houston. M-Braves products Alex Wood and Luis Avilan pitch for the Los Angeles Dodgers, and Jason Heyward and Tommy LaStella play for the Chicago Cubs. … Tuesday marked the end of an era in Tampa Bay with the unexpected departure – by mutual agreement? — of former Generals pitching coach Jim Hickey from the Rays’ staff. Hickey has been the Rays’ pitching coach for 11 years. He’ll have no trouble finding another job. Also on Tuesday, Seattle announced that ex-JaxMets shortstop Tim Bogar will not return as bench coach.