What: The Portland Timbers (0-5-1, 1 point) will travel to face the Columbus Crew (4-2-1, 13 points) in an MLS regular season game.When: Saturday, April 20 at 4:30 p.m. PT.Where: Mapfre Stadium in Columbus, Ohio.TV Channel: Fox 12 Plus/KPDX (In Portland: Comcast 13/713).Online: Out of market fans can pay to watch MLS games live on ESPN+. How to listen on the radio: 750 AM/102.9 FM The Game; Spanish radio: La GranD 1150 AM/93.5 FM.Portland TimbersSebastian Blanco, M: Blanco recorded an assist in a 2-1 loss to Dallas last week. He now has a goal and an assist in six starts this season. Blanco is a critical piece of Portland’s attack. He is capable of scoring goals in big moments and setting up chances for the club. He tallied 10 goals and 11 assists for Portland last season. He also scored three goals in the postseason to help lead the Timbers to the MLS Cup final.Jeff Attinella, GK: A week after making a career high 10 saves in a 3-0 loss to the San Jose Earthquakes, Attinella made three saves and put in another good performance in a 2-1 loss to Dallas last week. While the Timbers have struggled on defense…