With the completion of this week’s four-game sweep over the Chicago White Sox, the Tribe starters have continued their incredibly impressive hot streak. Ever since Carlos Carrasco’s last meltdown on July 6, they’ve been consistently dominant. That’s not news, as I wrote about this previously already.

But here are a few more notable facts about what the Indians starters have accomplished of late:

— Here are the starting pitcher statistics in 21 games since July 7:

9-2 record, 2.21 ERA, 134.3 IP (6.1/start), 8.0 K/9, 3.0 BB/9, .198/.268/.291 line.

— For the striking contrast, here are the starting pitcher statistics in the season’s first 87 games:

30-34 record, 4.62 ERA, 494.2 IP (5.2/start), 8.0 K/9, 3.5 BB/9, .262/.335/.427 line.

— And again, the starting pitching line that derailed the entire 162-game set in 2012:

48-76 record, 5.25 ERA, 913.2 IP (5.2/start), 6.1 K/9, 3.5 BB/9, .284/.351/.451 line.

— The pitching was slightly improved in the first half of this season across the board, while especially picking up the pace with the strikeouts. But still, their 4.62 ERA ranked in the bottom segment of the AL. Now, the Indians have had as impressive of a pitching streak as has taken place ever in franchise history. The .560 OPS allowed is in stark contrast to the .802 OPS from last season.

— Currently, all five long-term Indians starters (Masterson, Kluber, Kazmir, Jimenez and McAllister) have at least 12 starts with ERAs less than 4.20. The last time that happened in franchise history was 1969. Every single other American League team has turned this feat since at least 1976.

— The Indians now have four starters (all but McAllister) with at least 100 innings pitched that average at least 8.0 K/9. No other team in American League history has ever had this feat. Both Boston and Detroit have three such pitchers in 2013, but only three times has an AL team finished with exactly three, including the 1964 Indians as led by Sam McDowell.

— Specifically, Justin Masterson had his 11th start of at least 5 innings with one run or less last night. He became just the sixth Indians pitcher to pull off that feat since 1975. The last five: Cliff Lee, 2008; CC Sabathia, 2006; CC Sabathia, 2005; Charles Nagy, 1992; Greg Swindell, 1989.

— Tonight’s starter, Ubaldo Jimenez, had his best start of the season in his last outing, as measured by Game Score (81). He worked eight shutout innings for the second time this year. It was officially his best start as a Cleveland Indian, surpassing his outing on June 1 (80). His last better outing per Game Score (84) was Oct. 2, 2010, with Colorado.

— Overall, the Indians have allowed just 58 runs (seven unearned runs) in their last 21 games since July 7. Only eight other MLB teams have had better 21-game pitching stretches thus far in 2013.

[Related: Indians 6, White Sox 1: You can bring your green hat!!]