No one can refute Graham's impact on the Church. His tone, his call to salvation, and his demeanor say it all. Here is an interesting article from Slate.
Get Your God at the Ballpark - Billy Graham comes out of retirement to preach at Camden Yards. By John Dickerson: "After speaking for 25 minutes, Graham made an altar call. He invited those who wanted to proclaim their faith to come down to the field to renounce sin and take up a life with Jesus as their personal savior. The aisles filled immediately, like they do when the visiting team scores a late-inning grand slam. People streamed onto the outfield. No security guards stopped them. Volunteers patted them on the arm.
This was where the incongruity of the venue worked so powerfully. Graham's message wasn't just for Sunday or weddings or funerals. What he was offering was the promise of grace at any moment, including in left field under an Esskay hot-dog sign. Too frail to walk, the old man left the stage as he arrived, driven across the field on a golf cart. It's the same way they bring relief pitchers from the bullpen. He was departing after one more save."