Sanner came on around the hour-mark and provided the 'Caps an instant lift, slotting in the equalizer with only six minutes remaining in regulation time.
Just three minutes later, the Princeton product was in front of the net again, putting in his own rebound for the winner.
Still not done, the 22-year-old rookie sealed the win for the 'Caps on an odd-man break in added time, for his first professional hat trick, and the first in WFC2 history.
Sanner is the second WFC2 player to be awarded the weekly league honour. Ben McKendry was named USL Player of the Week in Week 6.
The 'Caps visit Sacramento Republic FC for a matchup of the top two sides in the Western Conference on Saturday. Watch the match live on whitecapsfc2.com.
MLS season ticket holders can redeem their WFC2 tickets through Account Manager, while single match tickets are available here.
USL Team of the Week
GK – Callum Irving, Rio Grande Valley FC: Irving recorded six saves after coming on as a first-half substitute, playing a key role as the Toros defeated Colorado Springs 2-0.
D – Aron Mkungilwa, FC Montreal: Mkungilwa had the game-winning goal and an assist as Montreal rallied for a 3-2 win against Bethlehem Steel FC on Sunday.
D – Patrick Slogic, Charlotte Independence: Slogic had a goal and assist as the Independence romped to a 4-0 win against Orlando City B last Wednesday night.
D – O’Brian Woodbine, Charleston Battery: Woodbine’s highlight reel strike earned the Battery a 1-1 draw with Wilmington Hammerheads FC on Saturday night.
M – Rafael Castillo, San Antonio FC: Castillo scored the game-winning goal for SAFC against Seattle Sounders FC 2 as it moved into the Western Conference playoff positions.
M – Sofiane Tergou, Rochester Rhinos: Tergou notched a pair of goals as the Rhinos swept to a 3-0 victory against the Pittsburgh Riverhounds on Saturday night.
M – Tommy Thompson, Sacramento Republic FC: Thompson had a goal and assist as Republic FC moved to the top of the Western Conference with a 4-0 win against Portland.
M – Timo Pitter, OKC Energy FC: Pitter had a goal and assist to lead Energy FC to a victory in the Black Gold Derby against Tulsa Roughnecks FC on Saturday night.
F – Dzenan Catic, Rio Grande Valley FC: Catic had three goals in two games as the Toros took a pair of road victories against Tulsa and Colorado Springs.
F – Brian Brown, Charlotte Independence: Brown had two goals and an assist as the Independence defeated Orlando City B 4-0 last Wednesday night.
F – Thomas Sanner, Vancouver Whitecaps FC 2: Sanner scored a hat trick in the final 10 minutes of the game as WFC2 took a 3-1 win against Arizona United SC on Sunday.
Bench: Matt Cardone (SA), Oumar Ballo (SPR), Michael Binns (WIL), Danny Barrera (SAC), Cesar Elizondo (SA), Junior Flemmings (NY), Cameron Iwasa (SAC)
This year, every Tier 1 ‘Caps Club MLS membership includes three open tickets to WFC2 matches. Members can select their matches and theme days online through Account Manager. Information on theme days is available at whitecapsfc.com/wfc2/themedays.
Youth season passes are also available for $30 all in. For more information contact firstname.lastname@example.org or call 604-484-7862.