QPR exited the FA Cup at the first round stage for the third consecutive season after an 80th minute goal from Michael Boulding gave Grimsby Town a 1-0 win.
Meanwhile, Matt Harrold grabbed a hat-trick as Brentford cruised through the first round with a 7-1 win over non-league Gainsborough Trinity.
Tony Rougier, Adam Frampton and Kevin O'Connor were the other Bees goalscorers along with a Chris Timons own-goal for the visitors.
Lee Ellington struck a late consolation for the Unibond League side.
Brentford have been drawn away to Telford in the FA Cup second round.
The non-league side earned a home tie with the Bees after coming back from 2-0 down to beat Crawley Town 3-2 in their first round match.
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