Is there a two on one rule in field hockey?

Answer 1

There is currently no offside rule in Field Hockey. There were prior offside rules, rules that restricted the positioning of players from the attacking team in a way similar to the offside rule in soccer. The offside rules were changed as the rules of field hockey changed. The evolution of the field hockey offside rule culminated with its abolition in the mid 1990s.

Answer 2

There is no rule, but an umpire will normally give a free hit to the opposition if two or more players go in for one tackle, due to danger or obstruction.