By Chris DeRosa (Guest Columnist)
Reading Sherman’s book, I got to wondering how many analysts would choose 1996 as Rivera’s best season. It’s chief rivals are 2005 and 1999. It would probably be easiest to sort through the cases of the closer seasons, and then compare to the set-up year in ’96.
We can easily rule out 2002, when injuries limited him to 46 innings; his debut season of 1995, when he was a starter with a 5.51 ERA; 2000, with his career-high relief ERA of 2.85; and both 1997 and 2006, which were fine seasons but boasting no advantages over his very best seasons.
2005 was the year Rivera had his best conventional rate stats: a career low 1.38 ERA (and a career high ERA+ of 323). He allowed his smallest percentage of baserunners (.235 on base percentage against), and was just as effective in denying power (hitters slugged .230 off him, missing his career best by only .002). He also had his best ever-rate of stranding inherited runners, allowing only 2 of 18 to score. He threw 78.3 innings, went 7-4, and saved 43 against 4 blown saves. In an unspectacular postseason, he allowed 1 run in 3 innings with two saves against the Angels.
In 1999, he was nearly as sharp in 69 innings, allowing a .239 on base percentage and a .237 slugging percentage. He went 4-3 with a 1.83 ERA with 45 saves against 4 blown saves. Of 27 runners inherited, he stranded 22 and permitted 5 to score. He also was the most efficient he had ever been, notching an out every 4.8 pitches, a career best. At this point, you would still have to put 2005 first. But then you get to the postseason. 1999 is in his top three: 12.3 scoreless innings, with 2 wins and 6 saves (and the World Series MVP Award). Counting their postseason and regular seasons stats together, 2005’s ERA advantage shrinks to 1.44 to 1.55. And there’s more: Rivera allowed only 1 unearned run in 1999, whereas he allowed 6 in 2005. If charged for all runs, inherited, earned, and unearned, in the regular and postseason, Mo was less scored upon in 1999 (2.21, 81.3 innings) than 2005 (2.32, 81.3 innings).
Rivera allowed an even smaller average of total runs the year before, in 1998. In 61.3 regular season innings, he allowed only 13 runs, all earned, and allowed only four of 24 inherited runners to score. In 13.3 postseason innings, he allowed only 6 hits, 2 walks, and no runs at all. In 74.6 combined innings, he allowed 2.05 runs per game, a career best. He also his highest percentage of good results: 3 wins, 36 saves, and 6 postseason saves, against no losses and only 5 regular season blown saves. Overall, though, it is hard to pick 1998 as his best year. The results may have been the cleanest, but he was hit harder (.270 on base percentage, .309 slugging percentage) than in 1999, and he didn’t pitch as much.
2001, when he saved 50 games and got more batters out (236) than in any other year besides 1996, was his career high in win shares. I’m a big win shares fan. Asking them to pick a closer’s best season, however, is among the last things win shares should be asked to do. It was a really good year, but he wasn’t as dominating as in other seasons, and given that, I wouldn’t pick the year he got beat by the Diamondbacks in the World Series as the best of his career.
