Rockies general manager Jeff Bridich has not identified candidates for the job vacated by Walt Weiss, beyond acknowledging when asked that Triple-A Albuquerque manager Glenallen Hill "would be somebody internally that we would consider." Porter is the fourth identified candidate with at least a full-season's worth of experience as a manager.
Others are former Padres manager Bud Black, who is now an Angels special assistant to the GM; former Astros manager Brad Mills, who is currently the Indians' bench coach; and former Brewers manager Ron Roenicke, who is now the Angels' third-base coach.
Coaches from outside the organization -- including some with limited managing experience -- who have been identified as being in the mix for Colorado's managerial opening are Indians first-base coach Sandy Alomar Jr., Red Sox bench coach Torey Lovullo, Cubs bench coach Dave Martinez, Braves first-base coach Eddie Perez and Giants bench coach Ron Wotus.
Hill is considered a candidate for the managing job or for a spot on the coaching staff, if the team hires from outside.
Weiss managed the Rockies for four seasons and went 283-365 before announcing at the end of the 2016 season that he would not return.
With candidates still involved in or recently finished with the postseason, a decision by the Rockies is not expected to happen quickly. Bridich will likely evaluate candidates via a detailed process, so there is no indication that there is a leading candidate.
According to people with knowledge of the situation, the Rockies are looking at candidates who will apply statistics and other research into managing and coaching, and who are adept at various methods for creating team chemistry.
The Rockies have retained three coaches from Weiss' staff -- pitching coach Steve Foster, bullpen coach Darren Holmes and third-base coach Stu Cole.
Thomas Harding has covered the Rockies since 2000, and for MLB.com since 2002. Follow him on Twitter @harding_at_mlb, listen to podcasts and like his Facebook page.
This story was not subject to the approval of Major League Baseball or its clubs.