Boston Police Officer Stephen Horgan knows where he will be as the Boston Red Sox pursue another World Series victory — the bullpen.

It’s where Horgan was Sunday night when Red Sox slugger David Ortiz’s grand slam barely squeezed past the glove of Tigers outfielder Torii Hunter, whose pursuit of the ball sent him tumbling head-first over the wall.

At the same time, Horgan raised both arms in triumph — a moment captured by Globe photographer Stan Grossfeld in a memorable photo.

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“It will be great to be a part of Red Sox history,’’ Horgan said at a press conference at Boston police headquarters today. “I’m a lifelong fan. This is going to be awesome.’’

The 50-year-old Horgan, a police veteran of 27 years, said he grew his beard just before the Red Sox entered the playoffs in a show of support for the team. He said he has worked on the police detail at Fenway Park for some 20 years, but only this year has he been assigned to the bullpen.

As a fan, Horgan said, he has often celebrated Red Sox triumphs while working on the security detail, but it was only his reaction to the grand slam by Ortiz that was captured by media cameras.

Boston Police Commissioner Edward Davis said today that Horgan will be assigned to the Red Sox bullpen, just like he was Sunday night, for the duration of the playoffs.

Horgan, who is currently assigned to Area D-4 in the South End, ended the press conference by recreating his now famous pose of putting his hands over his head — but only after being egged on by cameramen to do so.