teammate, rower...
Most of the dictionaries refer to an oarsman (oarsmen) as a person who rows, especially as a member of a team. However, one dictionary did provide the terms oarsman, oarswoman.
Stroke
This type of boat is called a "Shell". I'm assuming you are referring to the long craft with 4 or 8 oarsman, usually with a person called a "coxswain". When the oarsman handle one oar each, the boat is a shell, if the oarsman handle two oars each, it is a "Scull". I know I have seen 8-man (or woman) shells on tv coverage. I am not sure that the sculls are also olympic events, but I would assume they are. shells are seen as 2, 4, or 8 oarsman I have seen sculls as 1, 2, an I believe 4 oarsmen.
A blue.
Stroke
Oarsman- a man expert in rowing.
The Fighter
If the boat has an oarsman...a Coxswain.
A person, usually one of many, who uses an oar (paddle) to row a boat.
You may mean Thwart, which is a seat lying across a boat occupied by an oarsman
The national team is called Team Canada.