Warriors, Spurs showing 'no quit' heading into critical Game 5 of Western Conference semis

Golden State Warriors head coach Mark Jackson argues a call as his team plays the San Antonio Spurs during the second half of Game 3 of a Western Conference semifinal NBA basketball playoff series in Oakland, Calif., Friday, May 10, 2013. San Antonio won 102-92. (AP Photo/Marcio Jose Sanchez) (The Associated Press)

San Antonio Spurs' Manu Ginobili (20), of Argentina, stands next to head coach Gregg Popovich in the closing seconds of a loss to the Golden State Warriors in Game 4 of a Western Conference semifinal NBA basketball playoff series in Oakland, Calif., Sunday, May 12, 2013. Golden State won 97-87 in overtime. Ginobili had 21 points. (AP Photo/Marcio Jose Sanchez) (The Associated Press)

OAKLAND, Calif. – Golden State Warriors coach Mark Jackson placed a prominent poem by an unknown author in every player's locker before Game 4 against the San Antonio Spurs on Sunday that had a simple title.

Don't Quit.

Jackson's gritty Golden State team never has this season. Neither have the four-time champion Spurs, led by a group of veterans who have stood the test of time.

Young or old, it might not matter at this point.

Both teams are writing a new script in the playoffs, giving each other all they can handle in a thrilling Western Conference semifinal that has had more twists and turns than anybody ever predicted. The Warriors and Spurs head into a critical Game 5 tilt in San Antonio on Tuesday night tied at two apiece.