a gap in the rules of Major League Baseball

I have reached the limit of my baseball knowledge and must ask the help of my readers in resolving a bothersome question. In last night's game at Yankee Stadium between the Yankees and the Baltimore Orioles, a play occurred that I cannot figure out what to call. It was the top of the eighth inning with two outs and a runner on third base with Baltimore's Brian Roberts at bat and New York's Phil Coke pitching. Coke threw a wild pitch past catcher Jose Molina. Roberts ran home, Molina retrieved the ball and tossed it to Coke who was covering home plate, and Roberts was tagged out by Coke. As a defensive play, it's simple: catcher to pitcher, 2-1. But what is the action of the runner called?

Let's start by figuring out what the play was not. First of all, Coke's wild pitch was not scored a wild pitch because there was a putout on the play. (The same holds true for errors without adverse consequences for the team on defense: if the first baseman drops a fly ball but gets the batter out at first base anyway, no error is charged.) Second, the runner's action cannot be ruled caught stealing because attempting to steal on a wild pitch is not an attempt to steal.

ESPN's detailed play-by-play summary of the game refers to the play this way: 'B Roberts out at home on runner's fielder's choice.' What the hell is a 'runner's fielder's choice'? How can there be a fielder's choice when the ball was not put in play by a batter? My search last night, via Google, of the phrase 'runner's fielder's choice' yielded 166,000 hits, several of which were people asking, what the hell is a runner's fielder's choice?

That leaves me with two questions:

1. How would you name the runner's play?

2. Do you accept the term 'runner's fielder's choice', and, if so, what does it mean?

Many thanks to anyone who has insights about these important matters.

Update: I have corrected an error in my description of the play.