One of the Giants’ most iconic MLB playoff home runs during their five-season run of dominance from 2010 through 2014 actually was tough for top prospect Bryce Eldridge to watch.Eldridge, a native of Vienna, Va., grew up a Washington Nationals fan. During the 2014 National League Division Series between his favorite team and his future organization, the then-9-year-old was playing on a travel ball team.On Oct. 4, 16 days shy of Eldridge’s 10th birthday, Brandon Belt connected for a legendary 18th-inning solo homer off Nationals pitcher Tanner Roark to give the Giants an eventual 2-1 Game 2 win and a two-games-to-none lead in the best-of-five series.“I stayed up for that game,” Eldridge told NBC Sports Bay Area’s Alex Pavlovic on “Giants Talk,” which debuted Thursday. “That was probably 2014 and I was at a baseball tournament in Delaware. Maryland or Delaware. Belt hit that homer? Yeah, I was up for that. Broke my heart.“My travel team, obviously, we’re all from the D.C. area, we were all at The Greene Turtle [Sports Bar and Grille] watching that game. Ended up going back to the hotel because it went on all...