John Joseph "Jack" Armstrong (born January 3, 1963)[1] is an American sportscaster, working primarily for the Toronto Raptors on TSN and NBA TV Canada.

His father, who was from Castlebar, County Mayo, died when Jack was age seven and his mother Mary raised him alone.

In the 1992–93 season, he led the Niagara Purple Eagles to a 23–7 record and was named the New York State Division I Coach of the Year.

[7] Most recently, following the Raptors’ signings of Montreal natives Chris Boucher and Khem Birch, he would use “Bonjour” instead of "Helloooo" whenever a big play such as a block or dunk would be made by those players.

On Thursday, July 31, 2008, it was announced that Jack Armstrong would take over The Chuck Swirsky Show effective August 18, 2008, alongside Doug MacLean on the Toronto, Ontario AM sports talk radio station The Fan 590.