In total he made 49 appearances for the Catalan side, scoring nine goals.
Asdrubal Cabrera followed with a chopper through the left side, scoring Brantley to put Cleveland ahead.
Giroud has appeared in 19 matches for Arsene Wenger's side, scoring 10 goals.
Atsu has also made 16 appearances for the Ghana national side, scoring three goals.
On a 1-2 count, Paulino grounded a single through the right side, scoring Bay with the tying run.
That, undoubtedly, intensified Arsenal's bombardment of their area and increased the likelihood of the home side scoring.
But Catalanotto was looking in that location, and he slapped it through the left side, scoring two runs to give Toronto a 4-2 lead.
Far from merely pulling the engine-room strings, Ambrose has been a focal point of Neil Warnock's side; scoring in every game of the Eagles' unbeaten run.
Then Ruben Tejada, who fell into a two-strike count, shortened his swing and poked a single through the right side, scoring Nieuwenhuis to make it 5-4.
But he pulled a fastball sharply through the right side, scoring the pinch-runner Josh Harrison with the go-ahead run in a stirring 5-3 victory.
However with the £25m player must prove his worth in the multi-million pound side, scoring only one Champions League goal in two seasons.
