His downward header from Liam Craig's corner in the 122nd minute at Ibrox may well have been heading into the net before it was knocked home by team mate Chris Kane, the final touch robbing the Saints stopper of a place in the history books as one of a select few goalkeepers to have scored a goal in a senior match.
Remarkably, had Clark’s header gone straight in, he would not have been the first St Johnstone goalkeeper to have achieved such a feat in recent times, with Matt Glennon finding the net for the Perth side in similar circumstances back in 2010.
Scottish football has examples of goalkeepers who have scored after coming up for corners, from the penalty spot, or from huge kick-outs that have bounced into the opposition net. One goalkeeper even managed to find the net after being played outfield from the start!
Here are a selection of goalkeepers who achieved what Clark so nearly did at Ibrox on Sunday.
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. 09/08/14 SCOTTISH CHAMPIONSHIP HIBERNIAN V LIVINGSTON EASTER ROAD - EDINBURGH Hibernian keeper Mark Oxley (left) celebrates his goal with team-mate Jordan Forster.
Hibernian goalkeeper Mark Oxley (left) celebrates his goal with team-mate Jordan Forster. Photo: SNS Group Rob Casey
. Matt Glennon
Had Zander Clark's header gone straight into the Rangers net, then he would have become the St Johnstone keeper to score from a corner, with Glennon having volleyed home a last-minute equaliser in a 2-2 draw at Ross County in 2010. Photo: Stuart Franklin
. Hamish McAlpine
Scored four goals in his career, more than any other keeper in the history of Scottish football, three for Dundee United from the penalty spot, and one for Raith Rovers from his own penalty box. Photo: SNS Group 0141 221 3602
1. Matt Glennon
Had Zander Clark's header gone straight into the Rangers net, then he would have become the St Johnstone keeper to score from a corner, with Glennon having volleyed home a last-minute equaliser in a 2-2 draw at Ross County in 2010. Photo: Stuart Franklin
2. Hamish McAlpine
Scored four goals in his career, more than any other keeper in the history of Scottish football, three for Dundee United from the penalty spot, and one for Raith Rovers from his own penalty box. Photo: SNS Group 0141 221 3602
3. Campbell Money
St Mirren's all-time top scoring goalkeeper with two goals to hisn name, both penalties in December 1992 against Cowdenbeath and Clydebank. Photo: SNS Group
4. David Crawford
Scored the only goal of his career on October 25 2014, his long free-kick from his own half beating Montrose goalkeeper Lucas Birnsting in a 5-1 win for Arbroath. Photo: SNS Group Ross Parker