Big leaps in rating

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bebobattery

Hello, i have a question about rating. When starting a new game i sometimes check the rating development of the opponent. Here is an example from a player, say Player A:

Player xxx (1317) - Player A (1286) 1-0 (lost) 6/30/16

Player xxy (1281) - Player A (1274) 1-0 (lost) 6/30/16

Player A (1262) - Player xyy (1265) 0-1 (lost) 6/30/16

Player A (1765) - Player yyy (1477) 1-0 (won) 7/1/16

Player yyz (1525) Player A (1768) 0-1 (won) 7/7/16

How can Player A go from 1262 to 1765 in rating in one day and one game?

blastforme
the games are probably under different time controls. blitz/rapid/daily..
bebobattery

Ok, thanks.