Complex sentence: On May 23, Borden pitched a two-hit 8--0 shutout victory against the Cincinnati Reds, however some historians claim that this was, instead, the first no-hitter thrown in the NL, thus the first in major league history.
Split into simpler sentences: On May 23, Borden pitched a two-hit 8--0 shutout victory against the Cincinnati Reds. Various historians claim that this performance was, instead, the first no-hitter thrown in the NL, thus the first in major league history.