CINCINNATI -- No one is expecting Great American Ball Park to become a hotbed of disputed home run calls with Major League Baseball's new instant-replay system, but a pregame test performed by umpire Brian Gorman showed that the system is ready to go in the Reds' park.

"It's pretty symmetrical," Gorman said of Great American Ball Park, meaning that he didn't anticipate frequent use of the system. "Our main concerns are with places like Houston, with the line, or places where maybe you have an interference call with a fan being able to touch the ball."

As the acting crew chief, any review would happen solely at Gorman's discretion. He said he would take another umpire with him and that at least one would remain on the field during the review.

Replay has a very limited role right now -- unlike in the NFL where coaches can challenge play calls -- and Gorman remained hopeful that was how things would remain.

"With the technology, I kind of saw it coming for those kinds of calls," he said. "I hope it doesn't come to any more than that. ... With the way ballparks are being built, it is very tough to put yourself in the position to see something 350 feet away, and with the Green Monster in Boston, you'd have to be a giraffe."