During their great run of 2007-11, and the years around it, the Phillies were very lucky to have a double play combination who were both the best at their positions that the franchise has ever seen. And, in both cases, by a wide margin.
Both players have a case for the Hall of Fame: Rollins will appeal to more traditional voters with impressive counting stats at shortstop, a unique combination of power, speed, and fielding, and an MVP award. Utley did a lot of things very well, and so racked up among the highest WAR totals of his era, especially during a phenomenal peak, and he will get a lot of support from voters who are up to speed on advanced stats.