The following year, he took on an assistant GM role with the Rockies, then jumped ship to Boston in '03. In the years following, Byrnes was the sole General Manager of the Diamondbacks, where he oversaw the NLCS-bound 2007 squad and hired current Tigers manager A.J. Mike DeBartoloDeBartolo, already the interim General Manager of the Nationals, is obviously also under consideration for the full-time position going forward. DeBartolo, who's been with the club since 2012, was named assistant to the General Manager prior to the Nationals' World Series-winning 2019 campaign. It's also possible that DeBartolo is named General Manager underneath a new President of Baseball Operations.