John Thomas Brown Dumelow Platts (23 November 1848 – 6 August 1898) was an English cricketer who played for Derbyshire between 1871 and 1884.
In his youth, he worked in the local gypsum mines, and in his spare time would pretend to play cricket by bowling stones at imaginary batsmen.
He was fast bowling on a badly laid wicket at Lord's when the ball struck the batsman George Summers on the head.
W. G. Grace was also playing for MCC in the match and commented on the incident "...the bowler was not in the least to blame for the catastrophe, but he was terribly cut up, and I shall never forget his mental distraction.
"[1] Platts later turned out against All England XI's, first for Lichfield when he took 10 wickets in the match, and then for Wirksworth where he was upstaged by another future Derbyshire player Dove Gregory.
[4] Platts was a left-handed batsman and a right-arm round-arm slow bowler, with the added bonus of some occasionally fiendish pace to his straight-arm action.