Cricket must "look at the schedule" of a "relentless" calendar, with some players "obviously exhausted" this summer, says England and Wales Cricket Board chairman Richard Thompson.
This year's Hundred competition got under way the day after a thrilling England men's Test series against India finished, with some players missing the opening round of games.
"Cricket arguably does play too much," Thompson told BBC Sport.
"We're the only sport to have a World Cup every year, which I personally think is too much."