Looking at the Top SPs at the Trade Deadline... based on this:
https://www.mlbtraderumors.com/2023/07/top-50-deadline-trade-candidates-early-july-edition.html
1. Giolito (CWS): 19GS, 3.45 ERA, 112.1 IP, 117 SO. Could get and reject a QO
4. Montgomery (STL): 18GS, 3.23, 103.0, 96 SO. Could get and reject a QO
5. Flaherty (STL): 18GS, 4.29, 98.2, 96 SO. Not likely to get a QO, although possible
6. Stroman (CHC): 20GS, 2.88, 118.2, 101 SO. $21M Player Option in 2024s
8. Bieber (CLE): <could be facing TJ>. Arb3 in 2024.
9. Lorenzen (DET): 16GS, 3.75, 93.2, 73 SO. Pure rental
12. Rodriguez (DET): 13GS, 2.70, 76.2, 81 SO. Player option for 2024.
13. Lance Lynn (CWS): 19GS, 6.06, 108.1, 133 SO. $18M Team option for 2024
There really aren't any good options for controlled players.