The maximum number of overs a bowler can bowl in a One Day International is 10. In a standard 50-over ODI innings, a team may use several bowlers, but no individual bowler may deliver more than one-fifth of the innings: 10 overs, or 60 legal deliveries.
This limit prevents one outstanding bowler from dominating the entire match and encourages captains to balance pace, spin, opening spells, and death-overs specialists. A typical ODI attack may therefore include five bowlers, each completing 10 overs, although captains can use more bowlers and vary their workloads.
The rule becomes proportional when weather or other interruptions reduce the innings length. For example, in a 20-over innings, a bowler may generally deliver no more than four overs. An incomplete over caused by a rain interruption is still counted according to the competition's playing conditions, and replacement bowlers may finish overs if an original bowler is injured or suspended.