Top stats to know: Red Sox at Orioles

This week’s Wednesday Night Baseball features an AL East matchup between the Boston Red Sox and Baltimore Orioles at Camden Yards (7 ET on ESPN).

Here are some of the top stats to know on tonight’s starting pitchers.

Rubby De La Rosa

De La Rosa was one of the players to be named later for Boston in the Josh Beckett/Adrian Gonzalez trade. He was signed by the Dodgers as an amateur free agent out of the Dominican Republic in 2007.

Rubby De La Rosa
Pitch Pct This Season

De La Rosa has used four different pitches in his two starts for the Sox, but the changeup has been his main “out pitch”.

He’s thrown his changeup on 62.7 percent of his two-strike counts. Overall, hitters have chased 47.1 percent of them out of the strike zone.

To give some context to that number, hitters have chased 45.4 percent of Felix Hernandez's changeups out of the strike zone this season, and he has one of the best changeups in the majors. Keep in mind that De La Rosa has thrown only 82 changeups compared to Hernandez’s 410, but it is still a good sign for the young righty.

One reason De La Rosa has been so effective with his changeup is his electric fastball. He’s averaged 94.5 MPH with that pitch, tied for fourth highest in the AL among pitchers with at least two starts.

Wei-Yin Chen

Most Wins By Taiwanese Player
MLB History

Wei-Yin Chen was signed as an amateur free agent out of Taiwan in 2012. He’s already proven to be one of the most successful Taiwanese pitchers in MLB history.

The Orioles are scoring 5.5 runs per game when Chen starts, ninth most among qualified pitchers in MLB. Last season, the Orioles scored an average of 3.91 runs per game when he started, tied for 91st (Min. 100 IP).

Chen's go-to pitch has been his fastball, which he throws on 63.6 percent of his pitches, ninth most in the AL this season, but that’s on pace to be the lowest of his career. He threw his fast ball 68 percent of the time in 2013 and 65 percent of the time in 2012.

On two-strike counts, he goes to the fastball 61.6 percent of the time, fourth highest among qualified AL pitchers. However, hitters miss on only 13.1 percent of the swings they take against Chen’s two-strike fastballs, 26th out of 42 qualified pitchers in the AL. Overall, hitters have missed on 13.8 percent of the swings they’ve taken against Chen’s fastball, 19th in the AL.

Chen is lasting just 5.81 innings per start, the lowest of his career and tied for 76th out of 97 qualified pitchers, contributing to a major problem for Baltimore.

Orioles starters have struggled to go deep into games this year. On average, Orioles starters have lasted 5.70 innings per start this season, which is the 24th fewest in the majors. So far, Their starters have lasted six or fewer innings in 44 of their 63 games this season, tied for fifth most in the AL.