Wasn't he involved with the throw to first that hit J.C. Martin of the Mets in the 1969 Series? The throw hit Martin in the wrist, and I believe there was some controversy over whether Martin was out of the basepath.
I thought that was Etchebarren but you could very well be correct.....
From the baseball library web site: JC Martin triggered one of the most controversial plays in post-season history. He bunted to Baltimore pitcher Pete Richert, whose throw to first struck Martin on the wrist and ricocheted into short right, allowing pinch runner Rod Gaspar to score the winning run from second. Orioles manager Earl Weaver, who had been ejected earlier, saw the play and protested after the game that Martin had run illegally inside the foul line. Umpire Shag Crawford thought otherwise.
Weaver eventually got tossed from the game...the first manager to be thrown out of a WS game since 1935.
He did catch that game, but reliever Pete Richert made the play on the bunt (at least according to this write-up. The first series I have any memories of was O's/Pirates in '71.)
http://www.baseball-almanac.com/ws/yr1969ws.shtml
He was involved in a controversial play at the plate in the 1970 series.
http://www.baseball-almanac.com/ws/yr1970ws.shtml