Kent Spitfires were hammered by nine wickets by Northamptonshire in their final Metro Bank One-Day Cup match this summer in Canterbury as a poor season hit a new low point on Wednesday. Former Kent spinner Yuzvendra Chahal, whose signing was only confirmed by the visitors an hour before the start of play, took 5-14 during an unbroken 10-over spell as the hosts were dismissed for a mere 82 in 35.1 overs. Justin Broad was nearly as impressive, claiming 3-16 and Kent’s top-scorer – teenager Jaydn Denly – made just 22. Northants needed 14 overs to reach the target, James Sales finishing on 32 not …