The hooker's poor disciplinary record made him a controversial pick as captain.
And how do you pick the captain?
If Sam is unavailable, we'll pick a captain as we go forward," Diamond added.
"A new coach is, in essence, allowed to pick his captain.
"But you have to pick as captain someone who is 100% in your Test team.
Steven Gerrard was, of course, an automatic pick as captain and, once Hodgson plumped for Frank Lampard, there was no way a trio of elder statesman could pack for Brazil.
Steven Gerrard is an automatic pick as captain in central midfield, so it could be that Michael Carrick's ability to read the game and keep possession puts him in the frame to start alongside him in Brazil.
"I think we're going to take a complete review of everything concerning the Ryder Cup, beginning with the way we pick a captain and the players," Bishop told BBC Radio 5 live's Sportsweek.
Using the same pictures, the researchers got a 64% hit rate when they asked 681 children aged 5 through 13 to pick the "captain of their boat" in a computer game.
Even if he doesn't, he might do well enough to merit a pick by captain Nick Price.
