Of course...however the piece above doesn't claim that Sheehan bred those mares.
It says [He was first listed as a breeder by the United States Trotting Association in 1955, and bred Fleeting Star. Adora, Golden Miss, K Nora, and Lover’s Walk, all very important foundation mares in Shehan’s band.]
Note the full stop between 'Fleeting Star' and 'Adora'.