From the same article:
Kenta Maeda exceeded the 100-inning plateau in his start today, thus unlocking another $250K bonus in his Dodgers contract (hat tip to ESPN.com’s Doug Padilla). Maeda is only guaranteed $3MM per season from 2016 through 2023, though he can collect significant bonuses based on innings pitched, starts and making the Opening Day roster. Thus far, Maeda has received an extra $1.65MM in bonuses this season. Even if he maxes out those bonuses over the eight years under contract, Maeda is already looking like a bargain for the Dodgers given how well he has pitched in his first MLB season.
Cries in my beer...