[5] Scallan made his senior team debut in the National Hurling League in November 1992 and quickly became a regular member of the starting fifteen.
[7][8] A second Leinster SHC medal followed for Scallan in 1997, when Wexford retained the title after a defeat of Kilkenny.
[10] At inter-county level, Scallan became a selector as part of Colm Bonnar's Wexford senior hurling management team in November 2008.
[14] Scallan has also served as manager of the Mount Leinster Rangers and Éire Óg Greystones club sides.
[17] Scallan's four seasons in charge saw Wicklow win the National League Division 2B title following a 1-09 to 0-08 defeat of Derry in 2019.