He originally auditioned for the role of Tommy Donnelly on The Black Donnellys.
He has worked in the following movies:
Lassie as Mathew Turner
The Four Diamonds as Chris Millard
The Last Home Run as Young Jonathan
Wrestling With Alligators as Pete
Strike! as Frost
Tigerland as Pvt. Cantwell
Songs In Ordinary Time as Norm Fermoyle
Where Were The Mulwaneys as Judd Mulwaney
The Mudge Boy as Perry Foley
Justice as The Red Anarchist
Mystic River as Brendan Harris
Strip Search as Gerry Sykes
Strangers With Candy as P. John
Bristol Boys as Little Man
Steel City as PJ Lee
Black Irish as Terry
Prisoner as Bob.
In 1995, he was nominated for a Young Artist Award as an ensemble in the TV series Kids Incorporated.
In 1994, he won the Young Artist Award for his performance in his debut movie The Sandlot.
His stage credits include "The Tempest", "A Christmas Carol" and "Sarah and Abraham."
He is 5 foot 8 inches (1.73 metres) tall.
He has a lot of acting experience on theatres.
He made his acting debut in the movie The Sandlot in 1993, when he was just 11 years old.
He attended the St. Gregory the Great Catholic Elementary School in Hamilton Square, New Jersey.
He attended the Notre Dame High School in Lawrenceville, New Jersey.
Guiry had a son in 1999.
Guiry attended Notre Dame High School in Lawrenceville, New Jersey.
Guiry attended St. Gregory the Great Catholic Elementary School in Hamilton Square, New Jersey.
Guiry was nominated in 1995 for the Best Performance by a Youth Ensemble in a Television Series for Kids Incorporated (1984).
In 1994, Guiry won the Young Artist Award for Outstanding Youth Ensemble in a Motion Picture for the movie The Sandlot.
Guiry played the character Scotty Smalls in The Sandlot (1993).
Guiry: Having my son made me grow up. I'm keeping my dangers in the movies.
Guiry: If you don't get famous when you're a kid, it makes the transition to adult actor easier.