Both players began their Super Rugby careers 10 years ago, Bateman with the Crusaders and Delany with the Highlanders, and both have returned to New Zealand rugby after playing a number of seasons overseas.
Crusaders coach Scott Robertson said the pair's experience will be invaluable to the team as they attempt to go back-to-back.
"Tim and Mike are both playing outstanding rugby for their respective provincial teams, Canterbury and Bay of Plenty, and proving that they still have a heck of a lot to offer New Zealand rugby."