Who is the greatest MotoGP rider of the past decade? Followers of the sport will all have their own answers to this question, based on their own criteria. One way of trying to answer the question objectively is by using numbers to quantify performance. Sure, the numbers may overlook certain factors. But going over the numbers from 180 races held over the space of 10 years helps eliminate outliers, and separate the signal from the noise.
To qualify for consideration, you have to win races. The 180 races held between 2010 and 2019 have seen 13 different winners: Cal Crutchlow, Andrea Dovizioso, Andrea Iannone, Jorge Lorenzo, Marc Márquez, Jack Miller, Dani Pedrosa, Danilo Petrucci, Alex Rins, Valentino Rossi, Ben Spies, Casey Stoner, and Maverick Viñales. Of that group, Iannone, Miller, Petrucci, and Spies have all won only a single race, ruling them out of contention. Alex Rins has won two races, but the Suzuki rider has only been active for three seasons, meaning he made little impact over the full decade.
That left eight riders who have won multiple races this decade: Crutchlow, Dovizioso, Lorenzo, Márquez, Pedrosa, Rossi, Stoner, and Viñales. Of those eight, Andrea Dovizioso is the only rider to have started in all 180 races (he actually started 181 races, but the 2011 race in Sepang was red-flagged after Marco Simoncelli's tragic death, and would have started in Silverstone last year, had the race not been canceled due to the weather). Two other riders have started every MotoGP race held while they were in the class: Marc Márquez has competed in all 127 races held since 2013, and Maverick Viñales has started all 91 races held since 2015.
Whichever way you run the numbers, one rider stands head and shoulders above the rest.