On Jun. 12, Daniel Nava hit the first pitch he ever saw in the major leagues for a grand slam (just the second player ever to do that). It was awesome (you can watch video of it here). In an otherwise disappointing season at Fenway Park, it was one of the more amazing highlights of the year. Now, more than three months later -- and after 53 games and 145 at-bats -- we're still waiting for Daniel Nava's second career home run.
How long did the other first-AB slammers go before hitting their next home run?
Kevin Kouzmanoff was a first-pitch slammer when he connected off Edwin Volquez of the Rangers on Sept. 2, 2006. The next day, Kouzmanoff homered again, off Kevin Millwood of the Rangers.
Former Sox outfielder Jeremy Hermida was with the Marlins on Aug. 31, 2005, when he came to the plate for the first time, his team trailing the Cardinals 10-0, and hit a slam off Alberto Reyes (yes, the same Reyes who plunked Nomar Garciaparra in the wrist on Sept. 25, 1999, leading to his wrist issues the following season).
As Gordon Edes points out, there are of course players who hit a home run in the first MLB at-bat ... and then never homered again (19 players in all, in fact; visit ESPNBoston for the full list). Hopefully Nava does not join that infamous company.