The Reds took the lead on 29 minutes, Armstrong on target for Barnsley.
And it was 2-0 on 67 minutes when Sam Winnall found the net.
Brentford: Bentley, Colin, Egan, Bjelland, Barbet, Woods,
Yennaris, Saunders, Sawyers, KaiKai, Hogan. Subs: Macleod,
McEachran, Hofmann, Bonham, Kerschbaumer, Clarke, Dean.
Barnsley: Davies, Bree, Jackson, MacDonald, Yiadom, Watkins,
Hourihane, Morsy, Kent, Winnall, Armstrong. Subs: Hammill, Lee,
Townsend, Evans, Kpekawa, Williams, Brown.
Referee: James Linington (Isle of Wight)
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