Clarence Pearson, 41, was gunned down August 23 in broad daylight at East 161st Street and Gerard Avenue, a coveted intersection for vendors a block away from the ballpark.
He died from injuries on Saturday, police said.
Authorities believe Horace Coleman, 52, shot Pearson with a .357-caliber handgun, the culmination of a long-standing beef over the prime real estate.
Another man was wounded, too, but he is in stable condition, police said Thursday.
Pearson dropped the gun in front of a nearby pizzeria and surrendered to court officers who responded to the shooting, witnesses said.
Coleman, who has been charged with attempted murder, criminal possession of a weapon and assault, is scheduled back in court on Sept. 25. The charges expected to upgraded in light of Pearson's death, a spokesman for the Bronx District Attorney said Thursday.