|Date of birth:||April 23, 1964|
|Place of birth:||Gardner, Massachusetts|
|Height:||6 ft 4 in (1.93 m)|
|Weight:||217 lb (98 kg)|
|High school:||Oakmont Regional|
|Career NFL statistics|
|Player stats at PFR|
Halloran came to Boston College in 1983 and was the backup quarterback from 1983 to 1984, playing behind future Heisman Trophy winner Doug Flutie. In 1985, his first season as starter he completed 234 of 423 passes for 2,935 yards. Set BC single season records for pass attempts, completions, and interceptions (23). He led the team to a 9-3 record and a 27-24 win against the Georgia Bulldogs in the Hall of Fame Bowl, completing a 5-yard game winning touchdown pass to Kelvin Martin with 32 seconds remaining. The touchdown ended a 76-yard drive that lasted 2 minutes and 6 seconds. Halloran completed 31 of 52 attempts for 316 yards and 2 touchdowns. He was the game's Most Valuable Player. In his senior season, Halloran completed 159 of 258 passes for 2,029 yards and 17 touchdowns. The team however did poorly, finishing 5-6.
Halloran signed with the St. Louis Cardinals during the 1987 season. He appeared in 3 games, including two starts, completing 18 of 42 passes for 263 yards, no touchdowns and 1 interception. He was the backup behind Neil Lomax for the remainder of the season and retired in May 1988.
Halloran began his coaching career as a graduate assistant at Boston College and later was an assistant coach at Worcester Polytechnic Institute. From 1993–1997 he was Georgetown's offensive coordinator. From 1997–2002 he was Yale's special-teams coordinator. Under his tenure the Bulldogs won the 1999 Ivy League title and coached Yale's all-time leading kicker, punter and punt returner.
He spent the next three years as head coach at Franklin & Marshall. He finished with a 17-15 record, back-to-back Eastern College Athletic Conference playoff appearances, a 2004 Centennial Conference Championship, and one ECAC Southwest Bowl title. Franklin & Marshall advanced to the ECAC Southeast Bowl in 2005. Halloran was run out of Franklin and Marshall by the Alumni and Administrators. This was Halloran's last opportunity to be the head coach of a college football team. (.531).
From his head coaching position, he was named offensive coordinator of the Penn Quakers on February 20, 2006. After one season at Penn, he returned to Yale as the special teams coordinator for 2 seasons. On May 18, 2009 North Forest ISD's Board of Managers approved his appointment as the new athletic coordinator and head football coach for North Forest High School (Houston, Texas).