The Record
Robert W Sumner appears in the surviving Plainridge charts on 60 race days across 4 seasons, 2002 to 2005, taking 124 drives behind 40 different horses. Those drives produced 14 wins, 20 seconds and 14 thirds.
A strike rate on a half-mile or five-eighths oval says less about a driver than the same figure at a mile track, because post position and the first turn decide a great deal before the field has settled. Plainridge measured five-eighths of a mile, which puts four turns in a mile race and rewards a driver who can hold a pocket rather than one who simply leaves fast.
The horses Robert W Sumner drove most often here were VEGAS EXCALIBUR (7), STARBURST BLUECHIP (7), AUTOMATIC SCORER (6), WATCH PATROL (5). Repeated pairings usually mean a stable connection rather than a catch drive, and they are the most useful signal in the chart when reading a driver's form at a single track.
Every Drive Held Here
Questions about this driver
Which trainers engaged Robert W Sumner?
8 trainers in all, including Matthew A Medeiros, John E Ferrero and Derryl E Niles Jr. A driver is engaged race by race, so the list is a record of who called on Robert W Sumner rather than an employment history.
Which seasons did Robert W Sumner drive in?
2002, 2003, 2004, 2005 — 4 seasons in total, first appearing on 2002-05-13 and last on 2005-09-26. Gaps in the middle usually mean the paperwork for those cards did not survive, not that the driver was absent.
How many drives does the record show for Robert W Sumner?
124 charted drives across 60 race days, 2002 to 2005. Drives at other tracks are outside this record.
What is Robert W Sumner's win record here?
14 wins from 124 drives, 11.3%. With 20 seconds and 14 thirds, Robert W Sumner was in the first three 48 times.
Which horses did Robert W Sumner drive most often?
Vegas Excalibur (7), Starburst Bluechip (7) and Automatic Scorer (6), ahead of 3 other horses. Brackets give the number of drives.
What is the fastest winning mile Robert W Sumner recorded here?
1:54.3. That is the quickest time attached to a win in the recovered charts, not a track record — the records page carries those separately.