Landon Donovan was and continues to be the measuring stick for MLS players. His 334 MLS games played yielded 144 goals and 136 assists (both MLS records), numbers that could someday come under assault as the league continues to grow. Numbers that those who follow him on the pitches in MLS, will be compared to.
For a player to make a run at either of these records, they must have a combination of things. First they need longevity. Even at a 20 goal pace per season, a player would need over 7 seasons to overtake Donovan. That is a high output that would be difficult to sustain.