Adverbs that can modify the past tense verb "tackled" (in a football sense) include heavily, solidly, consistently, and effectively.

The adjective tackled (tackled tasks, tackled runners), from the verb to tackle, has no adverb form.

That is the correct spelling of "tackled" (in sports, brought down; or attempted a job)

Jim Brown was never tackled for a loss. Period. There is no need for further discussion .

Where he or she just got tackled

when tackled by defense