Opening Day trivia question (just one) -- who has hit home runs in...?

...the most time zones? Real home runs, real regular season (championship play) games, no trickiness about Standard v. Daylight Savings time. Nope. This MLB player has hit perfectly valid home runs in more time zones than anyone else. Who is he? How many time zones? (I stumbled across this a few weeks ago... show more ...the most time zones?

Real home runs, real regular season (championship play) games, no trickiness about Standard v. Daylight Savings time. Nope. This MLB player has hit perfectly valid home runs in more time zones than anyone else.

Who is he?
How many time zones?

(I stumbled across this a few weeks ago and have been saving it. Never would have thought of it myself. Enjoy.)
Update: One of you -- no surprise in either the individual or the quantity -- actually did the research, but missed a key point.
Update 2: And Utter Chaos once again belies his name by imposing absolute order upon a corner of the universe.

Tony Clark, who has gone yard in all four continental US zones, plus Puerto Rico (Atlantic) and Tokyo (Japan Std).

Six.

Gant still has the only HR hit in Hawaii.
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