The title is a biblical quote from the book of Isaiah.
This episode was set and filmed in Washington, D.C. Allison Hayes, who played Rose Pilcheck, was a 1949 Miss America contestant as Miss Washington, D.C.
One of the teams the guys are watching at the baseball game is the 2nd incarnation of the Washington Senators, who moved to Arlington, Texas in 1972 and became the Texas Rangers.
The ball park they go to was called the D.C. (District of Columbia) Stadium. It was renamed the RFK Stadium in 1969 following the 1968 assassination of Robert F. Kennedy.