Kenton lost ground on league leaders Harrow Town in the MCCL Division Three on Saturday despite clinging on to a point in a losing draw.
Visitors Barnet Bs were put into bat after Kenton won the toss and took command as they reached 252 in just 51.1 overs.
A positive knock from Matt Dampier (75) was well supported by Baig (60) as the Bs finished their innings firmly in the driving seat.
Schopun Jooma kept the home side in the hunt for the win, posting 70, but a succession of wickets fell before Kenton finished their 48 overs precariously placed on 206 for 9.
Uxbridge's win means Kenton slipped to fourth place as this season's campaign moved to the halfway point.
They now face a crucial fixture with fellow promotion contenders Highgate at home on Saturday.
The second team were less successful against table toppers Barnet Bs as they slumped to a seven-wicket defeat.
Visitors Kenton were put into bat by the league leaders and were bowled out in just 33.4 overs for a disappointing 133.
A target that the Bs met comfortably in just over 30 overs as they hit 138 for the loss of three wickets.
The loss means they slip to fifth in the league in a tight division which separates six teams by just seven points.
Kenton thirds were unable to turn the tide in a losing weekend as they failed to match league leaders Richmond.
Having won the toss Kenton put the home side into bat first but were unable to impose themselves as Richmond reached 195-5 off 50 overs.
In response Kenton limped to 162, losing by 33 runs.