Walter Niels "Cuckoo" Christensen (October 24, 1899 – December 20, 1984) born in San Francisco, California, was a baseball outfielder for the Cincinnati Reds (1926-1927). Christensen led the National League in on-base percentage (.426) in 1926. In two seasons, he played in 171 games and had 514 at bats, 66 runs, 162 hits, 21 doubles, 7 triples, 57 RBIs, 12 stolen bases, 60 walks, a .315 batting average, .392 on-base percentage, .383 slugging percentage, 197 total bases and 16 sacrifice hits. Defensively, he posted a .970 fielding percentage playing at all three outfield positions.