Fielders Choice w/ new Pitcher

Question
What is the ruling when there is a runner on first base with less then 2 outs, a new pitcher comes in to the game and there is a fielders choice hit.  It is my understanding that the old pitcher take responsibility for the new runner (as they have traded places) and if they runner scores, the earned run would be charged to the pitcher who came out, even though he never threw a pitch to the runner who scored.  Thanks for your reply!

Answer
Jonathan,

You are correct.  The original pitcher is still responsible for that runner.  Here's the exact phrasing from the major league rulebook:

(g) When pitchers are changed during an inning, the official scorer shall not charge the relief pitcher with any run (earned or unearned) scored by a runner who was on base at the time such relief pitcher entered the game, nor for runs scored by any runner who reaches base on a fielder抯 choice that puts out a runner left on base by any preceding pitcher.
Rule 10.16(g) Comment: It is the intent of Rule 10.16(g) to charge each pitcher with the number of runners he put on base, rather than with the individual runners. When a pitcher puts runners on base and is relieved, such pitcher shall be charged with all runs subsequently scored up to and including the number of runners such pitcher left on base when such pitcher left the game, unless such runners are put out without action by the batter (i.e., caught stealing, picked off base or called out for interference when a batter-runner does not reach first base on the play). For example:
(1) Peter is pitching. Abel reaches first base on a base on balls. Roger relieves Peter. Baker grounds out, advancing Abel to second base. Charlie flies out. Daniel singles, scoring Abel. Abel抯 run is charged to Peter
(2) Peter is pitching. Abel reaches first base on a base on balls. Roger relieves Peter. Baker forces Abel at second bases. Charlie grounds out, advancing Baker to second base. Daniel singles, scoring Baker. Baker抯 run is charged to Peter.
(3) Peter is pitching. Abel reaches first base on a base on balls. Roger relieves Peter. Baker singles, advancing Abel to third base. Charlie grounds to short, with Abel out at home plate and Baker advancing to second base. Daniel flies out. Edward singles, scoring Baker. Baker抯 run is charged to Peter.
(4) Peter is pitching. Abel reaches first base on a base on balls. Roger relieves Peter. Baker reaches on a base on balls. Charlie flies out. Abel is picked off second base. Daniel doubles, scoring Baker from first base. Baker抯 run is charged to Roger.
(5) Peter is pitching. Abel reaches first base on a base on balls. Roger relieves Peter. Baker reaches first base on a base on balls. Sierra relieves Roger. Charlie forces Abel at third base. Daniel forces Baker at third base. Edward hits a home run, scoring three runs. The official scorer shall charge one run to Peter, one run to Roger and one run to Sierra.
(6) Peter is pitching. Abel reaches first base on a base on balls. Roger relieves Peter. Baker reaches first base on a base on balls. Charlie singles, filling the bases. Daniel forces Abel at home plate. Edward singles, scoring Baker and Charlie. The official scorer shall charge one run to Peter and one run to Roger.
(7) Peter is pitching. Abel reaches first base on a base on balls. Roger relieves Peter. Baker singles, but Abel is out trying to reach third base and Baker advances to second base on the throw. Charlie singles, scoring Baker. Baker抯 run is charged to Roger.

Hope this helps!

Brian