Meanwhile, Bourne’s high scoring win against Woodhall Spa 2nd sees them in third, just four points behind Boston 2nd.
Ben Troops took seven for 15 for Boston who were all out for 142 before bowling Billingborough out for 125.
Hafiz Majeed turned in a man of the match performance for Spalding taking five Sleaford wickets to help bowl the visitors out for 98 then hitting an unbeaten 50 to take his side to victory.
Jaden Fell moved up to Grantham 2nds to hit an unbeaten 59 but Market Deeping 2nd proved too strong, winning by 62 runs.
And Belton Park scored their first win of the season, beating Long Sutton by 70 runs.
Spalding 2nd continue to lead Division One following a Juckes dominated win over Freiston.
Simon Juckes hit 53 as his side were all out for 126 then Jamie Juckes took six for 15 as Freiston were bowled out for 55.
Despite this defeat, Freiston stay second with Moulton Harrox 12 points behind in third following a high scoring game against Welby Cavaliers, who set a target of 212 for seven, only to see their opponents knock this total off without loss, Matt Barnett with an unbeaten 115 and Jack Barnett 91 not out.
Dylan Garfoot also hit a century after joining Timberland, his 101 helping his side to 278 for two.
Eric Askin then took five wickets to restrict Baston to 130 for eight.
Only one game was possible in Division Two in which Pinchbeck beat Spalding 3rd by two wickets.
The games at Claypole and Burgh & District were cancelled because of waterlogged pitches.
Premier Division: Bourne 2nd 273-8 (Greenfield 92, Wheelcock 62, Cooke 5-67)m Woodhall Spa 2nd 204; Boston 2nd 142, Billingborough 125 (B Troops 7-15); Market Deeping 2nd 226-3 (Witt 67), Grantham 2nd 164-6 (J Fell 59no); Sleaford 2nd 98 (Majeed 5-25), Spalding 99-4 (Majeed 50no); Belton Park 185 (Oldfield 5-38), Long Sutton 115.
Division One: Timberland 278-2 (D Garfoot 101, Behan 73no, Lowth 72no) Baston 130-8 (Askin 5-25); Spalding 2nd 126 (S Juckes 53), Freiston 55 (J Juckes 6-15); Welby Cavaliers 212-7 (Dale 50), Moulton Harrox 214-0 (M Barnett 115no, J Barnett 91no); Skegness 2nd 320-8, Billingborough 2nd 141; Grantham 3rd v Heckington - cancelled, waterlogged pitch.
Division Two: Spalding 3rd 151-7, Pinchbeck 152-8; Claypole v Grantham 4th - cancelled, waterlogged pitch Burgh & District v Long Sutton 2nd - cancelled, waterlogged pitch.