In the wake of manager Jim Tracy’s sudden and unexpected resignation Sunday, the wheels have begun to turn at 20th and Blake.

Monday night, hitting instructor Carney Lansford and third-base coach Rich Dauer were dismissed.

No other changes are planned on the major-league staff for now, but that could change once a new manager is in place. If Mark Wiley is hired as the director of pitching operations, as expected, Bob McClure becomes the heavy favorite to become the big-league pitching coach.

Lansford, who served two seasons under Tracy as the Rockies’ hitting instructor, helped a young Rockies club bat .274 this season, best in the National League. However, the Rockies hit just .241 and were tied for last in runs scored on the road.

As housecleaning after a 64-98 season began in earnest, the Rockies also started laying the groundwork for their next manager.

Bill Geivett, director of major-league operations, said Monday that the first step is to determine whether the club will look inside or outside the organization for Tracy’s replacement.

“Right now, I think it’s fair to say that we would hope to figure that out by the end of the week,” Geivett said.

Currently, in-house candidates include bench coach Tom Runnells and Stu Cole, manager of the Triple-A Colorado Springs Sky Sox.

Geivett met with team owner Dick Monfort on Monday and communicated with general manager Dan O’Dowd via text. O’Dowd is traveling and evaluating the Rockies’ minor-league talent.

Geivett said that he, along with Monfort and O’Dowd, will spearhead the search for a new manager, but added, “A number of people in our baseball operations department will be involved as well.”

While the Rockies hope to narrow their search this week, Geivett said there is no set timetable to hire a new manager.

“For us, first of all, we need to get the best person for the job, that’s the most important thing,” he said. “I would hope we would get a manager in place by the winter meetings.”

Major League Baseball’s winter meetings are scheduled for Dec. 3-6 in Nashville, Tenn.

Geivett admitted the organization was caught off guard by Tracy’s decision Sunday to resign with one year left on his contract. By resigning, Tracy forfeited $1.4 million. The Rockies finished the season 64-98, worst in franchise history.

“It’s been an interesting 32 hours or so, to be sure,” Geivett said. “From our standpoint, it looked like Jim was coming back. So right now, we are just starting to build our plan moving forward.”

On Sunday, Tracy told The Denver Post: “I really don’t feel that I am the right man for the job any longer. A lot of situations have changed since I was first asked to manage this club. It changed quite a bit from May 29 (2009) to the present. I am not the right man for this position.”

Patrick Saunders: 303-954-1428, psaunders@denverpost.com or twitter.com/psaundersdp