After a contested marking infraction where a pass has been completed, it is the marker's responsibility to announce if play was affected for the purpose of rule 16.3. In limited situations for contested marking infraction calls, when the marker diverts their attention away from marking while reasonably and quickly assessing the conditions to the thrower's marking infraction call, the marker could determine that play was affected. For example, the thrower calls straddle, and while the marker is looking at their feet to assess their marking position, the thrower completes a throw around the marker. If the marker subsequently contests the straddle because they assessed that they weren't committing a marking infraction, they could claim that play was affected and the disc should be returned to the thrower.