Both Ms Logan and Mr Sadler were involved with the women's team at Bicester Rugby Union Football Club.
The club's chair, Paul Jaggers, described Ms Logan, who joined the women's Vixens team about three years ago, as "a dedicated and driven number 8, committed to being the best player she could be for the team".
"She was a kind, gentle and thoughtful force to be reckoned with, who knew what the women's game deserved."
He said Mr Sadler had been involved with the club for more than 20 years, playing senior men's rugby for more than 10 years before "hanging up his playing boots" to support the women's team as first-aider.
He added he always brought "his infectious smile and energy to every game."
The club added "We will carry their memories in our hearts into every game, training, social and everyday".
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