Scan through the Penn women's track records from the past few years and you'll see a pair of names repeat themselves over and over: Claire Kim and Stacy Kim, usually with either a "1." or "2." next to their names.
The now-graduated twins were not only the Red and Blue's leading finishers, but were also their heart on and off the track.
As Gwen Harris' team gears up for its cross-country season, which starts this weekend, they'll be without the two stalwarts and left hoping the gaps will be filled.
"Losing them is pretty tough, but you want to think that you have people who have learned from them and ran behind them enough that they can support the program," Harris said.
Among those who ran behind the Kim sisters - and finished not too far behind them - in the 2007 cross-country season were Leah Brogan and Kinjal Parikh.
Although Penn has yet to participate in a meet this season, that pair appears to have taken the Kims' baton. As early as the first meet last season, Brogan and Parikh proved that they'd be ready for their turn in the middle lane.
Brogan clocked the Quakers' best time at the 2007 opening meet and was routinely hot on the Kims' heels throughout the rest of the fall season.
Parikh was no sloth herself, as she qualified for the NCAA Regionals in the 5000 meters, running Penn's second-best time in the event last year.
Harris also called her "one of [Penn's] top runners in the 1500m," as her third-best school time demonstrated.
Although Harris and her assistants kept tabs on the senior pair's training over the offseason, the Quakers have only been running together for a week. Conditioning and practice are still concerns.
"When you're training over the summer, you want to get in mileage and get fit so that you're ready for when you get back to campus," Harris said.
So as the track team looks to the season ahead, it is simultaneously pinning its hopes on Brogan and Parikh while looking back on the legacy of the Kim sisters.
"[The Kims] did an excellent job for the program and really put Penn back on the map," Harris said.
"They also taught the juniors and sophomores and freshmen what it meant to be a part of the Penn track team, and hopefully what they taught them, the girls are going to use this year."
