Coach B

A). Are all "defensive interference" plays called "obstruction"..?? Whereas most offensive interference plays are called "interference"...?? (I suppose except "catcher's interference" or "umpire's interference") B). Are all obstruction penalties by the defense a delayed call by the umpire? Or are any obstruction calls an immediate dead ball..?? C). Scenario: runner on 1st, base hit into the outfield: the baserunner as he's rounding second is obstructed by the shortstop covering the second base bag with no incoming throw. This is a delayed call/runner is awarded third base. It's delayed because the baserunner may choose to round third base, and if so, the delayed call is erased, and he is then a live runner..... is all this correct..??

A). Baserunner running his normal path to second base is called for interference by running into an infielder making a play on a batted ball. Is this a dead ball? Where are the other runners/batter placed? B). The batter makes contact with the catcher's mitt as he swings, but still manages a hit down the line that will certainly score the runner from second, and potentially be a double for himself. The plate umpire recognizes the catcher's interference. But.... is this an immediate dead ball?? C) Are most all offensive interference plays called immediately as a dead ball...?? Or delayed penalty...??

A runner seemingly scores at home with no throw to the plate, but does not actually touch home. The defense assumes he scores, and gets the ball to the pitcher and prepares for the next batter. The runner (who "scored") simply walks to his dugout, and the next batter gets ready to hit. The plate umpire says nothing and never signaled a safe call, and never signaled out as the runner walks off. Everybody in the park thinks he scored. What's the call?