A pitcher starts 21 games with 91 innings pitched, 100 hits, 42 earned runs, 36 walks, 76 strikeouts, and a pedestrian 6-5 record. But another statistic jumps out and that is a team record of 14-7 in those 21 starts. Obviously, that pitcher gave his team a jump-start to win the game. A winning percentage for his team is .667 and that is exactly what the winning percentage was for the Red Sox in 2018.
Now a pitcher who has a 1.49 WHIP and a 4.15 ERA is nothing startling but is acceptable when extrapolated for a 30-33 start range.