Teoscar didn't play all of 2024 in left field, he provided 436 innings in right field as well.
Go look at Santanders numbers in left field and compare to Teoscar. Santander has produced a combined -8 DRS/-6 OAA in the last three seasons combined in only 336 innings. Over an entire season of play that would amount to something like -20 DRS/-18 OAA. His 2023 numbers where he played quite a bit of left field are actually far worse on a rate basis than what Teoscar provided last season in left field.
Teoscar 2024 LF
-8 DRS/-9 OAA 871 IP (-9 DRS/1000 IP, - 10 OAA/1000 IP)
Santander 2023 LF
-8 DRS/-5 OAA 299 IP (-26 DRS/1000 IP, -16 OAA/1000 IP)
Santander doesn't exactly come out smelling like roses in this comparison.
This gets back to my main point that these guys are basically equivalent defenders in the outfield. They are both below average defenders as a whole. Each of them has typically been a tad below average most years in right field, and each has been absolutely awful in left field. I don't think either of them are likely comfortable in left field and as such their respective team's would largely be shooting themselves in the foot by deploying them in this fashion.