I know players multi-table online but Phil Ivey took it a step further by being in 3 events at the same time at the WSOP.

The events were
No. 32 ($5,000 no-limit hold’em six handed), event No. 33 ($2,500 pot-limit hold’em/ pot-limit Omaha) and event No. 35 ($10,000 no-limit hold’em heads-up championship. Hey, he was probably playng a couple of cash games on his ipad during bathroom breaks...
