The 6-foot-7, 300-pound Siddoway started all 26 games of his Mississippi State career at right tackle over the last two seasons. The Eugene, Ore., native is a possible late round selection in next month's NFL draft.
Washington is a 6-foot-2, 280-pound sophomore who did not play in a game last season. He is expected to be a backup on Mississippi State's defensive line next season.
The Oktibbeha County Sheriff's Department confirmed the arrests. Lieutenant Brett Watson said the pair had an initial court appearance on Thursday and bond was set at $20,000.
Watson said the alleged incident happened on Wednesday afternoon at an apartment complex just off of Mississippi State's campus. One of the victims identified Siddoway and then after a short investigation, Washington was also identified and arrested.
Mississippi State coach Dan Mullen said in a statement that the program is aware of the situation and Washington has been "suspended indefinitely pending further investigation."
The Starkville Daily News first reported the arrests.