Abraham Papali'i and Shane Delahunt were sent off in the second half and Munster capitalised to move into the last four of the Pro14.
The Ospreys were on the verge of victory despite George North's early red card, but Ashton Hewitt's try salvaged a draw for the Dragons.
Aled Davies has turned his back on his international career to sign for European and Premiership champions Saracens.
The Ospreys have turned to Toby Booth to take over as head coach when he finishes his assignment with Harlequins.
Wales full-back Liam Williams has joined the Scarlets ahead of schedule, while Rhys Webb joined Bath ahead of a move to Ospreys.
More Italian sporting fixtures have been delayed by the coronavirus, with Zebre & Benetton Treviso seeing matches postponed.
Leinster became the first Pro14 side to win their first 12 league matches of a season after they overcame Ospreys on Friday.
At the end of another week of crisis, Saracens had rare cause for cheer as they reached the quarter-finals of the European Champions Cup.
Rhys Carre's early red card made life difficult for Saracens, but they still defeated Ospreys in the European Champions Cup.
He may have been granted an early release by Toulon, but Rhys Webb will not play for them again if owner Bernard Lemaitre has... Read more
Having been granted an early release from his Toulon contract, Rhys Webb has agreed a return to Ospreys in 2020.
A move to the Ospreys or the Dragons is reportedly on the cards for Rhys Webb after Toulon agreed to release him from his... Read more
It was a miserable Boxing Day for the Ospreys, as they were hammered by the Scarlets, while Cardiff Blues won the other Welsh derby.
Wales scrum-half Tomos Williams was an usher at his brother's wedding and returned to celebrate after playing in Cardiff's derby win.
The Ospreys have confirmed Owen Watkin is facing up to eight weeks on the sidelines, ruling him out of the start of the Six... Read more
Juan Imhoff scored two of Racing 92's six tries as they beat Ospreys 40-27 to increase their lead at the top of Pool 4.