At the time of the transaction, the 29-year-old was hitting .209 with three home runs and 12 RBI in 56 games. His on-base percentage was .409, due to a solid walk rate of one every 4.1 plate appearances.
Though his season has mostly been disappointing, it has featured a few bright spots. In his first at-bat of the year, on April 6, Kottaras hit a three-run home run and on April 11, he collected two hits against the Chicago Cubs—his only multi-hit game of the campaign to date.
In return for the Canada native, the Brewers received 26-year-old De Los Santos, who had a 3.00 ERA with no decisions in six major league games for the Athletics this season. He was 1-3 with a 7.25 ERA in 28 relief appearances for the team’s Triple-A ballclub, the Sacramento River Cats.
Despite his minor league struggles this year, De Los Santos comes with some upside—he has the ability to start and relieve and, perhaps most notably, he strikes out batters with great frequency. In 36 innings pitched with Sacramento this season, he has 43 Ks, and in 2010 had 73 in only 47.1 innings of work.
Inconsistency has also been a hallmark of his professional career, however, with up-and-down season ERAs a norm. His ERAs each year from 2007 to 2012: 2.65, 5.87, 3.86, 5.13, 2.17 and 7.25.
He made his big league debut in 2010 and went 3-2 with a 4.32 ERA in 32 relief appearances for the Athletics. Overall, he is 3-2 with a 4.21 mark in 40 games.
Kottaras joined Milwaukee in 2010 after beginning his major league career with the Boston Red Sox in 2008. In five seasons, he has hit .221 with 18 home runs and 65 RBI.