Ronald C. Modra/Sports Imagery/Getty ImagesJohn Shelby finished second on the Dodgers in home runs in 1987 at age 29, then declined.As Dodgers watchers everywhere wonder how much latitude struggling James Loney will get, I thought I'd take a look at how much latitude others in similarly dire straits have gotten.Loney has a .534 OPS, putting him firmly in position to have one of the worst Dodgers starts through the end of May of any regular since 1988:Worst OPS through May(minimum 3.1 plate appearances per team game).452 John Shelby, 1989.457 Alfredo Griffin, 1988.532 Mike Davis, 1988.582 Cesar Izturis, 2003.595 Jose Offerman, 1994Source: Elias Sports Bureau (not adjusted for park factors)Here's what happened next to those five:John Shelby, 1989Shelby came to the Dodgers in a May 19