Siggelkow returns to the Bucks in 2017 for his third season in Waterloo. He made four appearances last year and finished with an 8.10 ERA including two strikeouts in 3.1 innings of work. As a Buck in 2015 he went 1-2 with a 2.28 ERA in five games (four starts) in 2015. Siggelkow made 14 appearances (four starts) in 2017 for the St. Cloud State going 4-1in 42.1 innings with an ERA of 4.89 while picking up 32 strikeouts.

After redshirting in 2015, Siggelkow finished without a record or an ERA in two relief appearances for the Huskies in 2016. In 1.1 innings, the southpaw yielded a hit and a walk while striking out a pair. Siggelkow was a three-time All-Conference selection, a two-time All-Section selection and a MSHSBCA All-State selection in baseball as a senior at St. Anthony Village High School. The St. Anthony Village, Minn., native was also named Second Team All-Metro and a Perfect Game USA Central Region Honorable Mention selection in baseball as a senior.