The home-grown off spinner caused mid-innings havoc as the home side recovered from losing two wickets in two balls, following a run out from Harry Clibbens on debut and Will Wade enticing an ill-judged leave from Carillon keeper John Harrison the very next ball, left the home side 2-2 and Sileby the perfect start to the season with Steven Ingram winning the toss and, unsurprisingly, bowling first.
Swapnil Kulkarni (49) and Mark Trimmingham (20) set about repairing the damage only for Kulkarni's dismissal, caught and bowled by Blay, to spark a run of six wickets going down for just 35 runs with Blay claiming 5-31.
"Thomas keeps getting better and better every season," commented Ingram of his young spinner. "His spell was definitely the catalyst for the win," he added.
A late order recovery from Carillon skipper Andrew Capel (33*) and Dillon Patel 16 as an unbroken ninth wicket stand of 46 saw their side through to a competitive 149-8.
Sileby's reply was made all the easier thanks to 48 from Joe Charity, who shared in an opening stand of 66 with Chris Bulmer (31) and Brady Glennon anchored the rest of the chase with an unbeaten 37 as the visitors eased home by six wickets and with over five overs in the bank.
Ingram was, understandably, delighted with the win. "It was a fantastic team display and sets the bar high for how we want to play."
With the 1s and 3s games at Mill Lane both being abandoned without a ball being bowled (both sides getting 8 points each) Ingram will be hoping that the weather forecasters have it wrong and Mill Lane can dry out ahead of back to back home games against Leicester Banks 1s and Newtown Linford 2s.