The Perth Heat will enter 2020 just one game out of holding the best record in the Australian Baseball League following a tremendous 3-1 series victory on the road to the Sydney Blue Sox.

The Heat were looking to bounce back from losing their first series of the 2019/20 ABL season last week to the Adelaide Giants at Harley-Davidson Ballpark, but it was always going to be a tough challenge away to the perennially strong Blue Sox at Blacktown International Sports Park.

The Heat started strongly on Friday night led by South African pitcher Dylan Unsworth, who was awarded his fourth win from six starts this season in a 5-3 victory.

The Heat hadn’t scored in the last 22 innings against the Giants the previous week and that stretched to 26 having failed to score in the first four appearances at bat on Friday night.

But they managed to score five runs over the fifth and sixth innings to rack up 14 hits for the night on the way to the 5-3 victory.

Perth then made a fast start on Saturday night with two runs in the first inning. Sydney tied scores up with two runs in the fourth to see scores remain 2-2 at the end of nine.

The game went into the 10th inning tie-break with both teams starting with runners on first and second.

It was a clever Heat move for Jess Williams to bunt and get bases loaded and then Tim Kennelly made good connection on a sacrificial fly ball.

He might have got caught, but Ulrich Bojarski scored while Alex Hall and Jess Williams advanced. A Pete Kozma single and then Robbie Glendinning getting walked allowed the Heat to go up 5-2. That's where the scored stayed as Daniel Schmidt completed a standout 10-inning pitching display.

The Heat had the chance to wrap the series up on Sunday in what doubled as the 300th ABL appearance of Tim Kennelly. But it wasn’t to be with the Blue Sox starting on fire with eight runs over the first four innings on the way to securing the 8-4 victory despite 13 hits from the Heat.

That left the Heat with some work to do to close out the series on Monday with Trevor Frank up to pitch. Sydney scored first in the first inning but the Heat's bats soon warmed to the task.

The visitors piled on four runs in the third highlighted by a Kennelly double in game No. 301.

Things remained tight until the seventh when the Heat pulled away with a home run to Jordan Qsar which brought Kennelly home to take scores to 6-3. Bojarski also homered in the eighth and the Heat went on to win 10-3 to take the series three games to one.

As Kennelly looks back on the series where he brought up 300 games in the league, ultimately it was that 10th inning performance of Game 2 that was critical.

"Obviously the tie-breaker rule is something that's been brought into the ABL which is pretty cool. Jess Williams did the job of getting the bunt down to get on base which loaded up," Kennelly said.

"With loaded bases with none out, it's pretty simple at bat really. You just have to put the ball in play and try to score a run. Then Pete came up huge after me and got a base hit for us to score another couple. You just try and score one or two runs in that extra inning to give your team a chance to win."

That leaves the Heat in second position of the southwest conference with a 15-9 record just behind the Adelaide Giants who are now 16-8.

The Heat are back home this coming weekend to bring in 2020 looking for revenge for last year's championship series against the Brisbane Bandits with the series starting Friday night before two games on Saturday and the decider on Sunday at Harley-Davidson Ballpark.