A mighty last ball six by South Australian bowling allrounder Ryan Harris lifted the Redbacks to a dramatic victory over Queensland in the one-day match at Adelaide Oval on Wednesday night.

SA had appeared easy winners when man of the match Matthew Elliott (103) and Darren Lehmann (62) were together, but a late stumble to Bulls allrounder James Hopes (4-38) left them needing five off the final ball to pass Queensland's 7-268.

Harris, a fine performer at grade level who has played only bit parts for his state, stepped in to deposit former Redback spinner Lachlan Stevens miles over long-on for the state's first win since a narrow triumph over NSW in their opening game of the summer.

The victory was soured by a hamstring injury to spearhead Shaun Tait, who left the field after pulling up sharply on delivering the first ball of his second spell, leaving him unlikely to play in SA's Pura Cup encounter with the Bulls from Friday and perhaps casting doubt over his chances of a role with the Australian side in the new year.

"Great to get a result go our way, we've had three thrillers really and today we got onto the right side of it, we needed that," Lehmann said.

"Shaun's got an MRI scan tomorrow, I think he probably wouldn't play in the four dayer, but that will be up to the medicos, so we'll see what they say.

"It was a great thing about our win also, we were down a class bowler."

For the Bulls, an opening stand of 86 by James Hopes (74) and Jimmy Maher (38) was followed up with a percussive 88 by Craig Philipson.

Redbacks spinner Daniel Cullen (3-32) bowled with enticing loop and excellent control to rein in the mid-section of the Bulls' innings.

When SA chased, Cosgrove's waistline worries were exacerbated when he gifted his wicket with a flat-footed swish at Ashley Noffke.

Showcasing a wide array of shots, No. 3 Harris made his second half century in successive one day innings v Queensland (he made 77 at the Gabba last season) before splicing an attempted pull shot from Hopes to Philipson at midwicket.

Callum Ferguson then gave the Bulls the upper hand by flicking absent-mindedly to the same man, meaning Lehmann walked to the crease with much still to do.

Playing safe, Elliott and Lehmann allowed the required rate to creep beyond seven per over before launching an offensive, signalled by Elliott's majestic cover-driven six off Chris Simpson.

Together they got to within 26 runs of victory, but Elliott's tired shot at Hopes gave the Bulls a slight opening that became a pronounced one when Noffke (2-65) found a way through Lehmann's defence with his final ball.

The wickets also dried up the runs, and from needing 26 in four overs SA found itself needing 11 off the final over, curiously delivered by Stevens after Maher had used up his more recognised bowlers.

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