Leslie Gamboni for The New York Times
Last summer, while reading a list of Louisiana’s top college football recruiting prospects, Archie Manning noticed that only one of the high school players did not have a Twitter account. It happened to be his grandson and namesake Arch, a nephew of Peyton and Eli.
“I was kind of proud of that,” the elder Manning said in a telephone interview.
At 16, Archibald Charles Manning is a 6-foot-3 ½ inch, 198-pound sophomore at the Isidore Newman School in New Orleans, the latest flowering branch on the family quarterback tree and potentially the third generation of the Manning family to play in the N.