Event Note:
| % | Championship | 52.23 | Shaun Ward | Alaska Anchorage | 2011 |
| # | GNAC | 51.48 | Vladislav Tsygankov | Simon Fraser | 2017 |
| $ | McArthur Field | 51.33 | Keith Stuffl e, | Oregon International | 1997 |
| Lane | Athlete | Yr. | Team | Seed |
|---|---|---|---|---|
| 1 | Adhemar, Joshua | JR | Simon Fraser | 57.77 |
| 2 | Seifert, Peter | SO | Concordia (Ore.) | 56.17 |
| 3 | Turner, Travis | SR | Alaska Anchorage | 55.16 |
| 4 | Scott, Trevaughn | JR | Central Washington | 54.11 |
| 5 | Cummings, Cordell | FR | Western Washington | 55.00 |
| 6 | Gunther, Ryan | SO | Central Washington | 57.20 |
| 7 | Spatz, Micah | SR | Northwest Nazarene | 55.54 |
| 8 | Lovercamp, Reid | SO | Western Washington | 57.32 |
| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 2 | Bierly, Robert | SO | Concordia (Ore.) | 59.02 | 59.02 Linfield Jenn Boyman Memorial Invitational |
| 3 | Gamza, Andrey | FR | Concordia (Ore.) | 56.06 | 56.06 L&C Spring Break Open 2017 |
| 4 | Scott, Trevaughn | JR | Central Washington | 53.72 | 53.72 San Francisco State Distance Carnival |
| 5 | Conrad, Ben | JR | Simon Fraser | 57.34 | 57.34 2017 Ken Shannon Invitational |
| 6 | Forster, Michael | SO | Central Washington | 57.95 | 57.95 CWU Spike Arlt Inv |
| 7 | Lovercamp, Reid | SO | Western Washington | NT |
| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 2 | Chism, Ryan | SO | Northwest Nazarene | 59.08 | 59.08 Border Clash 2017 |
| 3 | Spatz, Micah | SR | Northwest Nazarene | 55.62 | 55.62 Border Clash 2017 |
| 4 | Cummings, Cordell | FR | Western Washington | 55.41 | 55.41 Bryan Clay Invite |
| 5 | Seifert, Peter | SO | Concordia (Ore.) | 57.35 | 57.35 Linfield Open |
| 6 | Turner, Travis | SR | Alaska Anchorage | 57.58 | 57.58 2017 Triton Invitational |
| 7 | Walter, Andrew | SO | Saint Martin's | 1:01.54 | 1:01.54 2017 Ralph Vernacchia Track & Field Meet |
| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 2 | Polkow, Landon | SR | MSU-Billings | 58.75 | 58.64 Tom Benich Invitational |
| 3 | Bosscher, Aaron | FR | Western Washington | 58.64 | 58.64 2017 Ralph Vernacchia Track & Field Meet |
| 4 | Adhemar, Joshua | JR | Simon Fraser | 57.14 | 57.14 2017 Ralph Vernacchia Track & Field Meet |
| 5 | Gunther, Ryan | SO | Central Washington | 56.39 | 56.39 2017 Ken Shannon Invitational |