The Sox acquired Siebert along with Vicente Romo and Joe Azcue for Dick Ellsworth, Ken Harrelson, and Juan Pizarro. As Red Sox trades go, this was actually a good one for Boston. Azcue and Romo were replacement level, but Harrelson and Pizzaro only had one good year for Cleveland and Ellsworth never really did much after that. Pizzaro would have another good season later with the Cubs. Of course, that means the Red Sox won this trade, because although Siebert was mediocre in 1969 and 1973, he was quite good in between.
A lot went right for Sonny Siebert in 1971. Not only did he pitch very well, winning 16 games with a 2.91 ERA, but Sonny also had a great year with the BAT. That’s right, folks. American League pitchers still had to come to bat until 1973. What’s particularly incredible about Siebert’s 1971 season with the bat is that in no other season did he come close to being that good. In 1971, he hit .266/.289/.532 with 6 HR and 15 RBI. His career marks? .173/.204/.270 with 12 HR. Crazy fluke or not, it was a really nice year for Sonny.