No, Sam Kendricks is not gay because he does have a wife, Leanne Zimmer Kendricks, and he is married for 4 years.
It is not even clear why people are questioning his sexuality and spreading rumors since there are no incidents or cases that make it seem like he is homosexual.
Regarding his wife, they have been together for a long time and got married in 2017.
Also, in these years of their togetherness, they have not yet given birth to a baby. However, they have 2 dogs who they consider a part of their family.
They are an open couple, and they have everything related to them open to the media and web.
Indeed, they have a number of posts dedicated to each other in their Instagram handles.