Northampton substitute Elliott List scored within seconds of his 75th-minute introduction as Town beat 10-man Plymouth 3-0 at Home Park.
Playmaker Jack Perkins was provider, crossing from the left for List to tap-in on the line.
Perkins also provided the cross for striker Tom Eaves to loop a header over Conor Hazard for the opener in the 58th minute.
Town made it 3-0 in the 80th minute as substitute Jordan Willis headed home from a cross from skipper Terry Taylor.
Northampton's Ethan Wheatley came closest to opening the scoring with a 20-yard shot that beat Hazard and pinged back off the post in the 55th minute.
It was a warning sign as three minutes later Eaves headed Town ahead.
Argyle were reduced to 10 men when nine-goal top scorer Lorent Tolaj was shown a straight red card in the 65th minute for an off-the-ball incident.
The closest Plymouth came to scoring was in the sixth minute when Owen Dale's corner was volleyed back across goal by Matthew Sorinola and Tolaj headed just wide.
Match report supplied by PA Media.
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