"They wanted someone to entertain, and I know David and he knew I played in Wanganui Brass - I guess it's a play on the Barmy Army's trumpet guy. Chris plays in Wanganui Brass too so I asked him to join me and that's how it came about really."
The English tourists are legendary in world cricketing circles with their trumpeter often heralding successful play by their on-field idols.
The Wanganui two-man version have been looking for a name all series with ground announcers simply introducing them as Mark and Chris.
"Someone came up with Boundary Brass and that seems to have stuck for now, but we're open for appropriate suggestions."
Keelty was keen on the Chronicle's suggestion of Perfect Pitch, but not so keen on The Blow Hards.
"Yeah, well there's certainly plenty of them in brass bands," was all he said about the latter suggestion.
Keelty, a corrections officer at Whanganui Prison at Kaitoke and Scudder, a student, certainly had the perfect pitch to whet Cricket New Zealand's appetite to entertain spectators at T20 matches.
"We have already performed at five matches - two in Hamilton, and one each in Auckland, Wellington and Napier and this weekend we're back to Hamilton for the finals," Keelty said.
"We get all expenses paid, including flights when available, meals, accommodation and a rental car. We even get a small payment for playing - it's the dream gig, really, and we both love cricket."
The pair try and find a spot in the stands away from spectators while performing, which wouldn't be difficult with only small crowds attending the series.
"We are careful not to play right in spectators' ears," Keelty said.
On Friday, The Northern Knights take on the Wellington Firebirds with the winner going straight to Sunday's final. The loser of Friday's clash plays Auckland to decide the second finalist.