Lasith Malinga rested due to the injury..

           Unconfirmed source revealed that unavailability of Lasith Malinga rest of the Indian Premier League season 05 Due to a growing back injury.
Lasith Malinga rested due to the injury against Delhi Daredevil match played on 16th.
Mumbai Indians team currently relay on Lasith Malinga's unorthodox bowling performance and his unavailability will make major breakthrough for their seasons performances.
Lasith Malinga will arrive Sri Lanka and will not available for next couple of weeks. Sri Lanka Cricket officials responsible for their players physical fitness levels and also Twenty20 world cup  scheduled four months ahead. World cup t20 hosting by Sri Lanka from September 18th.